20640420

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:192

約数の個数: 144

約数和(自身を含む): 67511808

約数和(自身を除く): 46871388

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 31, 36, 45, 54, 60, 62, 81, 90, 93, 108, 124, 135, 137, 155, 162, 180, 186, 243, 270, 274, 279, 310, 324, 372, 405, 411, 465, 486, 540, 548, 558, 620, 685, 810, 822, 837, 930, 972, 1116, 1215, 1233, 1370, 1395, 1620, 1644, 1674, 1860, 2055, 2430, 2466, 2511, 2740, 2790, 3348, 3699, 4110, 4185, 4247, 4860, 4932, 5022, 5580, 6165, 7398, 7533, 8220, 8370, 8494, 10044, 11097, 12330, 12555, 12741, 14796, 15066, 16740, 16988, 18495, 21235, 22194, 24660, 25110, 25482, 30132, 33291, 36990, 37665, 38223, 42470, 44388, 50220, 50964, 55485, 63705, 66582, 73980, 75330, 76446, 84940, 110970, 114669, 127410, 133164, 150660, 152892, 166455, 191115, 221940, 229338, 254820, 332910, 344007, 382230, 458676, 573345, 665820, 688014, 764460, 1032021, 1146690, 1376028, 1720035, 2064042, 2293380, 3440070, 4128084, 5160105, 6880140, 10320210, 20640420]

約数ペア:

[(1, 20640420), (2, 10320210), (3, 6880140), (4, 5160105), (5, 4128084), (6, 3440070), (9, 2293380), (10, 2064042), (12, 1720035), (15, 1376028), (18, 1146690), (20, 1032021), (27, 764460), (30, 688014), (31, 665820), (36, 573345), (45, 458676), (54, 382230), (60, 344007), (62, 332910), (81, 254820), (90, 229338), (93, 221940), (108, 191115), (124, 166455), (135, 152892), (137, 150660), (155, 133164), (162, 127410), (180, 114669), (186, 110970), (243, 84940), (270, 76446), (274, 75330), (279, 73980), (310, 66582), (324, 63705), (372, 55485), (405, 50964), (411, 50220), (465, 44388), (486, 42470), (540, 38223), (548, 37665), (558, 36990), (620, 33291), (685, 30132), (810, 25482), (822, 25110), (837, 24660), (930, 22194), (972, 21235), (1116, 18495), (1215, 16988), (1233, 16740), (1370, 15066), (1395, 14796), (1620, 12741), (1644, 12555), (1674, 12330), (1860, 11097), (2055, 10044), (2430, 8494), (2466, 8370), (2511, 8220), (2740, 7533), (2790, 7398), (3348, 6165), (3699, 5580), (4110, 5022), (4185, 4932), (4247, 4860)]