81816860

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{337}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 176030400

約数和(自身を除く): 94213540

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 199, 244, 305, 337, 398, 610, 674, 796, 995, 1220, 1348, 1685, 1990, 3370, 3980, 6740, 12139, 20557, 24278, 41114, 48556, 60695, 67063, 82228, 102785, 121390, 134126, 205570, 242780, 268252, 335315, 411140, 670630, 1341260, 4090843, 8181686, 16363372, 20454215, 40908430, 81816860]

約数ペア:

[(1, 81816860), (2, 40908430), (4, 20454215), (5, 16363372), (10, 8181686), (20, 4090843), (61, 1341260), (122, 670630), (199, 411140), (244, 335315), (305, 268252), (337, 242780), (398, 205570), (610, 134126), (674, 121390), (796, 102785), (995, 82228), (1220, 67063), (1348, 60695), (1685, 48556), (1990, 41114), (3370, 24278), (3980, 20557), (6740, 12139)]