20018020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4789}}^1$

素因数の和:4828

約数の個数: 48

約数和(自身を含む): 48283200

約数和(自身を除く): 28265180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4789, 9578, 19156, 23945, 47890, 52679, 90991, 95780, 105358, 181982, 210716, 263395, 363964, 454955, 526790, 909910, 1000901, 1053580, 1819820, 2001802, 4003604, 5004505, 10009010, 20018020]

約数ペア:

[(1, 20018020), (2, 10009010), (4, 5004505), (5, 4003604), (10, 2001802), (11, 1819820), (19, 1053580), (20, 1000901), (22, 909910), (38, 526790), (44, 454955), (55, 363964), (76, 263395), (95, 210716), (110, 181982), (190, 105358), (209, 95780), (220, 90991), (380, 52679), (418, 47890), (836, 23945), (1045, 19156), (2090, 9578), (4180, 4789)]