21669640

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 50621760

約数和(自身を除く): 28952120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 83, 107, 122, 166, 214, 244, 305, 332, 415, 428, 488, 535, 610, 664, 830, 856, 1070, 1220, 1660, 2140, 2440, 3320, 4280, 5063, 6527, 8881, 10126, 13054, 17762, 20252, 25315, 26108, 32635, 35524, 40504, 44405, 50630, 52216, 65270, 71048, 88810, 101260, 130540, 177620, 202520, 261080, 355240, 541741, 1083482, 2166964, 2708705, 4333928, 5417410, 10834820, 21669640]

約数ペア:

[(1, 21669640), (2, 10834820), (4, 5417410), (5, 4333928), (8, 2708705), (10, 2166964), (20, 1083482), (40, 541741), (61, 355240), (83, 261080), (107, 202520), (122, 177620), (166, 130540), (214, 101260), (244, 88810), (305, 71048), (332, 65270), (415, 52216), (428, 50630), (488, 44405), (535, 40504), (610, 35524), (664, 32635), (830, 26108), (856, 25315), (1070, 20252), (1220, 17762), (1660, 13054), (2140, 10126), (2440, 8881), (3320, 6527), (4280, 5063)]