21500890

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{491}}^1$

素因数の和:678

約数の個数: 32

約数和(自身を含む): 40383360

約数和(自身を除く): 18882470

約数列:

[1, 2, 5, 10, 29, 58, 145, 151, 290, 302, 491, 755, 982, 1510, 2455, 4379, 4910, 8758, 14239, 21895, 28478, 43790, 71195, 74141, 142390, 148282, 370705, 741410, 2150089, 4300178, 10750445, 21500890]

約数ペア:

[(1, 21500890), (2, 10750445), (5, 4300178), (10, 2150089), (29, 741410), (58, 370705), (145, 148282), (151, 142390), (290, 74141), (302, 71195), (491, 43790), (755, 28478), (982, 21895), (1510, 14239), (2455, 8758), (4379, 4910)]