21418852

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{163}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 48987456

約数和(自身を除く): 27568604

約数列:

[1, 2, 4, 7, 13, 14, 19, 26, 28, 38, 52, 76, 91, 133, 163, 182, 247, 266, 326, 361, 364, 494, 532, 652, 722, 988, 1141, 1444, 1729, 2119, 2282, 2527, 3097, 3458, 4238, 4564, 4693, 5054, 6194, 6916, 8476, 9386, 10108, 12388, 14833, 18772, 21679, 29666, 32851, 40261, 43358, 58843, 59332, 65702, 80522, 86716, 117686, 131404, 161044, 235372, 281827, 411901, 563654, 764959, 823802, 1127308, 1529918, 1647604, 3059836, 5354713, 10709426, 21418852]

約数ペア:

[(1, 21418852), (2, 10709426), (4, 5354713), (7, 3059836), (13, 1647604), (14, 1529918), (19, 1127308), (26, 823802), (28, 764959), (38, 563654), (52, 411901), (76, 281827), (91, 235372), (133, 161044), (163, 131404), (182, 117686), (247, 86716), (266, 80522), (326, 65702), (361, 59332), (364, 58843), (494, 43358), (532, 40261), (652, 32851), (722, 29666), (988, 21679), (1141, 18772), (1444, 14833), (1729, 12388), (2119, 10108), (2282, 9386), (2527, 8476), (3097, 6916), (3458, 6194), (4238, 5054), (4564, 4693)]