20657988

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1193}}^1$

素因数の和:1253

約数の個数: 72

約数和(自身を含む): 57803928

約数和(自身を除く): 37145940

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 37, 39, 52, 74, 78, 111, 117, 148, 156, 222, 234, 333, 444, 468, 481, 666, 962, 1193, 1332, 1443, 1924, 2386, 2886, 3579, 4329, 4772, 5772, 7158, 8658, 10737, 14316, 15509, 17316, 21474, 31018, 42948, 44141, 46527, 62036, 88282, 93054, 132423, 139581, 176564, 186108, 264846, 279162, 397269, 529692, 558324, 573833, 794538, 1147666, 1589076, 1721499, 2295332, 3442998, 5164497, 6885996, 10328994, 20657988]

約数ペア:

[(1, 20657988), (2, 10328994), (3, 6885996), (4, 5164497), (6, 3442998), (9, 2295332), (12, 1721499), (13, 1589076), (18, 1147666), (26, 794538), (36, 573833), (37, 558324), (39, 529692), (52, 397269), (74, 279162), (78, 264846), (111, 186108), (117, 176564), (148, 139581), (156, 132423), (222, 93054), (234, 88282), (333, 62036), (444, 46527), (468, 44141), (481, 42948), (666, 31018), (962, 21474), (1193, 17316), (1332, 15509), (1443, 14316), (1924, 10737), (2386, 8658), (2886, 7158), (3579, 5772), (4329, 4772)]