20388040

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{163}}^1$

素因数の和:286

約数の個数: 64

約数和(自身を含む): 47822400

約数和(自身を除く): 27434360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 59, 106, 118, 163, 212, 236, 265, 295, 326, 424, 472, 530, 590, 652, 815, 1060, 1180, 1304, 1630, 2120, 2360, 3127, 3260, 6254, 6520, 8639, 9617, 12508, 15635, 17278, 19234, 25016, 31270, 34556, 38468, 43195, 48085, 62540, 69112, 76936, 86390, 96170, 125080, 172780, 192340, 345560, 384680, 509701, 1019402, 2038804, 2548505, 4077608, 5097010, 10194020, 20388040]

約数ペア:

[(1, 20388040), (2, 10194020), (4, 5097010), (5, 4077608), (8, 2548505), (10, 2038804), (20, 1019402), (40, 509701), (53, 384680), (59, 345560), (106, 192340), (118, 172780), (163, 125080), (212, 96170), (236, 86390), (265, 76936), (295, 69112), (326, 62540), (424, 48085), (472, 43195), (530, 38468), (590, 34556), (652, 31270), (815, 25016), (1060, 19234), (1180, 17278), (1304, 15635), (1630, 12508), (2120, 9617), (2360, 8639), (3127, 6520), (3260, 6254)]