21256460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{619}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 47809440

約数和(自身を除く): 26552980

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 101, 170, 202, 340, 404, 505, 619, 1010, 1238, 1717, 2020, 2476, 3095, 3434, 6190, 6868, 8585, 10523, 12380, 17170, 21046, 34340, 42092, 52615, 62519, 105230, 125038, 210460, 250076, 312595, 625190, 1062823, 1250380, 2125646, 4251292, 5314115, 10628230, 21256460]

約数ペア:

[(1, 21256460), (2, 10628230), (4, 5314115), (5, 4251292), (10, 2125646), (17, 1250380), (20, 1062823), (34, 625190), (68, 312595), (85, 250076), (101, 210460), (170, 125038), (202, 105230), (340, 62519), (404, 52615), (505, 42092), (619, 34340), (1010, 21046), (1238, 17170), (1717, 12380), (2020, 10523), (2476, 8585), (3095, 6868), (3434, 6190)]