20472850

素因数分解:

$2^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:235

約数の個数: 48

約数和(自身を含む): 39640320

約数和(自身を除く): 19167470

約数列:

[1, 2, 5, 10, 25, 50, 71, 73, 79, 142, 146, 158, 355, 365, 395, 710, 730, 790, 1775, 1825, 1975, 3550, 3650, 3950, 5183, 5609, 5767, 10366, 11218, 11534, 25915, 28045, 28835, 51830, 56090, 57670, 129575, 140225, 144175, 259150, 280450, 288350, 409457, 818914, 2047285, 4094570, 10236425, 20472850]

約数ペア:

[(1, 20472850), (2, 10236425), (5, 4094570), (10, 2047285), (25, 818914), (50, 409457), (71, 288350), (73, 280450), (79, 259150), (142, 144175), (146, 140225), (158, 129575), (355, 57670), (365, 56090), (395, 51830), (710, 28835), (730, 28045), (790, 25915), (1775, 11534), (1825, 11218), (1975, 10366), (3550, 5767), (3650, 5609), (3950, 5183)]