19685920

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2017}}^1$

素因数の和:2093

約数の個数: 48

約数和(自身を含む): 47293848

約数和(自身を除く): 27607928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2017, 2440, 4034, 4880, 8068, 9760, 10085, 16136, 20170, 32272, 40340, 64544, 80680, 123037, 161360, 246074, 322720, 492148, 615185, 984296, 1230370, 1968592, 2460740, 3937184, 4921480, 9842960, 19685920]

約数ペア:

[(1, 19685920), (2, 9842960), (4, 4921480), (5, 3937184), (8, 2460740), (10, 1968592), (16, 1230370), (20, 984296), (32, 615185), (40, 492148), (61, 322720), (80, 246074), (122, 161360), (160, 123037), (244, 80680), (305, 64544), (488, 40340), (610, 32272), (976, 20170), (1220, 16136), (1952, 10085), (2017, 9760), (2440, 8068), (4034, 4880)]