21565960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{619}}^1$

素因数の和:710

約数の個数: 64

約数和(自身を含む): 53121600

約数和(自身を除く): 31555640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 67, 104, 130, 134, 260, 268, 335, 520, 536, 619, 670, 871, 1238, 1340, 1742, 2476, 2680, 3095, 3484, 4355, 4952, 6190, 6968, 8047, 8710, 12380, 16094, 17420, 24760, 32188, 34840, 40235, 41473, 64376, 80470, 82946, 160940, 165892, 207365, 321880, 331784, 414730, 539149, 829460, 1078298, 1658920, 2156596, 2695745, 4313192, 5391490, 10782980, 21565960]

約数ペア:

[(1, 21565960), (2, 10782980), (4, 5391490), (5, 4313192), (8, 2695745), (10, 2156596), (13, 1658920), (20, 1078298), (26, 829460), (40, 539149), (52, 414730), (65, 331784), (67, 321880), (104, 207365), (130, 165892), (134, 160940), (260, 82946), (268, 80470), (335, 64376), (520, 41473), (536, 40235), (619, 34840), (670, 32188), (871, 24760), (1238, 17420), (1340, 16094), (1742, 12380), (2476, 8710), (2680, 8047), (3095, 6968), (3484, 6190), (4355, 4952)]