20199985400

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{38891}}^1$

素因数の和:38974

約数の個数: 144

約数和(自身を含む): 55664952840

約数和(自身を除く): 35464967440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 53, 56, 70, 98, 100, 106, 140, 175, 196, 200, 212, 245, 265, 280, 350, 371, 392, 424, 490, 530, 700, 742, 980, 1060, 1225, 1325, 1400, 1484, 1855, 1960, 2120, 2450, 2597, 2650, 2968, 3710, 4900, 5194, 5300, 7420, 9275, 9800, 10388, 10600, 12985, 14840, 18550, 20776, 25970, 37100, 38891, 51940, 64925, 74200, 77782, 103880, 129850, 155564, 194455, 259700, 272237, 311128, 388910, 519400, 544474, 777820, 972275, 1088948, 1361185, 1555640, 1905659, 1944550, 2061223, 2177896, 2722370, 3811318, 3889100, 4122446, 5444740, 6805925, 7622636, 7778200, 8244892, 9528295, 10306115, 10889480, 13611850, 14428561, 15245272, 16489784, 19056590, 20612230, 27223700, 28857122, 38113180, 41224460, 47641475, 51530575, 54447400, 57714244, 72142805, 76226360, 82448920, 95282950, 100999927, 103061150, 115428488, 144285610, 190565900, 201999854, 206122300, 288571220, 360714025, 381131800, 403999708, 412244600, 504999635, 577142440, 721428050, 807999416, 1009999270, 1442856100, 2019998540, 2524998175, 2885712200, 4039997080, 5049996350, 10099992700, 20199985400]

約数ペア:

[(1, 20199985400), (2, 10099992700), (4, 5049996350), (5, 4039997080), (7, 2885712200), (8, 2524998175), (10, 2019998540), (14, 1442856100), (20, 1009999270), (25, 807999416), (28, 721428050), (35, 577142440), (40, 504999635), (49, 412244600), (50, 403999708), (53, 381131800), (56, 360714025), (70, 288571220), (98, 206122300), (100, 201999854), (106, 190565900), (140, 144285610), (175, 115428488), (196, 103061150), (200, 100999927), (212, 95282950), (245, 82448920), (265, 76226360), (280, 72142805), (350, 57714244), (371, 54447400), (392, 51530575), (424, 47641475), (490, 41224460), (530, 38113180), (700, 28857122), (742, 27223700), (980, 20612230), (1060, 19056590), (1225, 16489784), (1325, 15245272), (1400, 14428561), (1484, 13611850), (1855, 10889480), (1960, 10306115), (2120, 9528295), (2450, 8244892), (2597, 7778200), (2650, 7622636), (2968, 6805925), (3710, 5444740), (4900, 4122446), (5194, 3889100), (5300, 3811318), (7420, 2722370), (9275, 2177896), (9800, 2061223), (10388, 1944550), (10600, 1905659), (12985, 1555640), (14840, 1361185), (18550, 1088948), (20776, 972275), (25970, 777820), (37100, 544474), (38891, 519400), (51940, 388910), (64925, 311128), (74200, 272237), (77782, 259700), (103880, 194455), (129850, 155564)]