20499990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:162

約数の個数: 128

約数和(自身を含む): 60162048

約数和(自身を除く): 39662058

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 31, 35, 42, 47, 62, 67, 70, 93, 94, 105, 134, 141, 155, 186, 201, 210, 217, 235, 282, 310, 329, 335, 402, 434, 465, 469, 470, 651, 658, 670, 705, 930, 938, 987, 1005, 1085, 1302, 1407, 1410, 1457, 1645, 1974, 2010, 2077, 2170, 2345, 2814, 2914, 3149, 3255, 3290, 4154, 4371, 4690, 4935, 6231, 6298, 6510, 7035, 7285, 8742, 9447, 9870, 10199, 10385, 12462, 14070, 14539, 14570, 15745, 18894, 20398, 20770, 21855, 22043, 29078, 30597, 31155, 31490, 43617, 43710, 44086, 47235, 50995, 61194, 62310, 66129, 72695, 87234, 94470, 97619, 101990, 110215, 132258, 145390, 152985, 195238, 218085, 220430, 292857, 305970, 330645, 436170, 488095, 585714, 661290, 683333, 976190, 1366666, 1464285, 2049999, 2928570, 3416665, 4099998, 6833330, 10249995, 20499990]

約数ペア:

[(1, 20499990), (2, 10249995), (3, 6833330), (5, 4099998), (6, 3416665), (7, 2928570), (10, 2049999), (14, 1464285), (15, 1366666), (21, 976190), (30, 683333), (31, 661290), (35, 585714), (42, 488095), (47, 436170), (62, 330645), (67, 305970), (70, 292857), (93, 220430), (94, 218085), (105, 195238), (134, 152985), (141, 145390), (155, 132258), (186, 110215), (201, 101990), (210, 97619), (217, 94470), (235, 87234), (282, 72695), (310, 66129), (329, 62310), (335, 61194), (402, 50995), (434, 47235), (465, 44086), (469, 43710), (470, 43617), (651, 31490), (658, 31155), (670, 30597), (705, 29078), (930, 22043), (938, 21855), (987, 20770), (1005, 20398), (1085, 18894), (1302, 15745), (1407, 14570), (1410, 14539), (1457, 14070), (1645, 12462), (1974, 10385), (2010, 10199), (2077, 9870), (2170, 9447), (2345, 8742), (2814, 7285), (2914, 7035), (3149, 6510), (3255, 6298), (3290, 6231), (4154, 4935), (4371, 4690)]