21293590

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{461}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18623210

約数列:

[1, 2, 5, 10, 31, 62, 149, 155, 298, 310, 461, 745, 922, 1490, 2305, 4610, 4619, 9238, 14291, 23095, 28582, 46190, 68689, 71455, 137378, 142910, 343445, 686890, 2129359, 4258718, 10646795, 21293590]

約数ペア:

[(1, 21293590), (2, 10646795), (5, 4258718), (10, 2129359), (31, 686890), (62, 343445), (149, 142910), (155, 137378), (298, 71455), (310, 68689), (461, 46190), (745, 28582), (922, 23095), (1490, 14291), (2305, 9238), (4610, 4619)]