21404415

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1\times {\mathrm{241}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 35684352

約数和(自身を除く): 14279937

約数列:

[1, 3, 5, 15, 31, 93, 155, 191, 241, 465, 573, 723, 955, 1205, 2865, 3615, 5921, 7471, 17763, 22413, 29605, 37355, 46031, 88815, 112065, 138093, 230155, 690465, 1426961, 4280883, 7134805, 21404415]

約数ペア:

[(1, 21404415), (3, 7134805), (5, 4280883), (15, 1426961), (31, 690465), (93, 230155), (155, 138093), (191, 112065), (241, 88815), (465, 46031), (573, 37355), (723, 29605), (955, 22413), (1205, 17763), (2865, 7471), (3615, 5921)]