20645480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{313}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 49850640

約数和(自身を除く): 29205160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 97, 136, 170, 194, 313, 340, 388, 485, 626, 680, 776, 970, 1252, 1565, 1649, 1940, 2504, 3130, 3298, 3880, 5321, 6260, 6596, 8245, 10642, 12520, 13192, 16490, 21284, 26605, 30361, 32980, 42568, 53210, 60722, 65960, 106420, 121444, 151805, 212840, 242888, 303610, 516137, 607220, 1032274, 1214440, 2064548, 2580685, 4129096, 5161370, 10322740, 20645480]

約数ペア:

[(1, 20645480), (2, 10322740), (4, 5161370), (5, 4129096), (8, 2580685), (10, 2064548), (17, 1214440), (20, 1032274), (34, 607220), (40, 516137), (68, 303610), (85, 242888), (97, 212840), (136, 151805), (170, 121444), (194, 106420), (313, 65960), (340, 60722), (388, 53210), (485, 42568), (626, 32980), (680, 30361), (776, 26605), (970, 21284), (1252, 16490), (1565, 13192), (1649, 12520), (1940, 10642), (2504, 8245), (3130, 6596), (3298, 6260), (3880, 5321)]