28568120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{397}}^1$

素因数の和:672

約数の個数: 64

約数和(自身を含む): 73932480

約数和(自身を除く): 45364360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 257, 280, 397, 514, 794, 1028, 1285, 1588, 1799, 1985, 2056, 2570, 2779, 3176, 3598, 3970, 5140, 5558, 7196, 7940, 8995, 10280, 11116, 13895, 14392, 15880, 17990, 22232, 27790, 35980, 55580, 71960, 102029, 111160, 204058, 408116, 510145, 714203, 816232, 1020290, 1428406, 2040580, 2856812, 3571015, 4081160, 5713624, 7142030, 14284060, 28568120]

約数ペア:

[(1, 28568120), (2, 14284060), (4, 7142030), (5, 5713624), (7, 4081160), (8, 3571015), (10, 2856812), (14, 2040580), (20, 1428406), (28, 1020290), (35, 816232), (40, 714203), (56, 510145), (70, 408116), (140, 204058), (257, 111160), (280, 102029), (397, 71960), (514, 55580), (794, 35980), (1028, 27790), (1285, 22232), (1588, 17990), (1799, 15880), (1985, 14392), (2056, 13895), (2570, 11116), (2779, 10280), (3176, 8995), (3598, 7940), (3970, 7196), (5140, 5558)]