20997330

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:491

約数の個数: 64

約数和(自身を含む): 52956288

約数和(自身を除く): 31958958

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 41, 43, 82, 86, 123, 129, 205, 215, 246, 258, 397, 410, 430, 615, 645, 794, 1191, 1230, 1290, 1763, 1985, 2382, 3526, 3970, 5289, 5955, 8815, 10578, 11910, 16277, 17071, 17630, 26445, 32554, 34142, 48831, 51213, 52890, 81385, 85355, 97662, 102426, 162770, 170710, 244155, 256065, 488310, 512130, 699911, 1399822, 2099733, 3499555, 4199466, 6999110, 10498665, 20997330]

約数ペア:

[(1, 20997330), (2, 10498665), (3, 6999110), (5, 4199466), (6, 3499555), (10, 2099733), (15, 1399822), (30, 699911), (41, 512130), (43, 488310), (82, 256065), (86, 244155), (123, 170710), (129, 162770), (205, 102426), (215, 97662), (246, 85355), (258, 81385), (397, 52890), (410, 51213), (430, 48831), (615, 34142), (645, 32554), (794, 26445), (1191, 17630), (1230, 17071), (1290, 16277), (1763, 11910), (1985, 10578), (2382, 8815), (3526, 5955), (3970, 5289)]