21771560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{317}}^1$

素因数の和:446

約数の個数: 64

約数和(自身を含む): 52546320

約数和(自身を除く): 30774760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 101, 136, 170, 202, 317, 340, 404, 505, 634, 680, 808, 1010, 1268, 1585, 1717, 2020, 2536, 3170, 3434, 4040, 5389, 6340, 6868, 8585, 10778, 12680, 13736, 17170, 21556, 26945, 32017, 34340, 43112, 53890, 64034, 68680, 107780, 128068, 160085, 215560, 256136, 320170, 544289, 640340, 1088578, 1280680, 2177156, 2721445, 4354312, 5442890, 10885780, 21771560]

約数ペア:

[(1, 21771560), (2, 10885780), (4, 5442890), (5, 4354312), (8, 2721445), (10, 2177156), (17, 1280680), (20, 1088578), (34, 640340), (40, 544289), (68, 320170), (85, 256136), (101, 215560), (136, 160085), (170, 128068), (202, 107780), (317, 68680), (340, 64034), (404, 53890), (505, 43112), (634, 34340), (680, 32017), (808, 26945), (1010, 21556), (1268, 17170), (1585, 13736), (1717, 12680), (2020, 10778), (2536, 8585), (3170, 6868), (3434, 6340), (4040, 5389)]