20728040

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{167}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28260760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 107, 116, 145, 167, 214, 232, 290, 334, 428, 535, 580, 668, 835, 856, 1070, 1160, 1336, 1670, 2140, 3103, 3340, 4280, 4843, 6206, 6680, 9686, 12412, 15515, 17869, 19372, 24215, 24824, 31030, 35738, 38744, 48430, 62060, 71476, 89345, 96860, 124120, 142952, 178690, 193720, 357380, 518201, 714760, 1036402, 2072804, 2591005, 4145608, 5182010, 10364020, 20728040]

約数ペア:

[(1, 20728040), (2, 10364020), (4, 5182010), (5, 4145608), (8, 2591005), (10, 2072804), (20, 1036402), (29, 714760), (40, 518201), (58, 357380), (107, 193720), (116, 178690), (145, 142952), (167, 124120), (214, 96860), (232, 89345), (290, 71476), (334, 62060), (428, 48430), (535, 38744), (580, 35738), (668, 31030), (835, 24824), (856, 24215), (1070, 19372), (1160, 17869), (1336, 15515), (1670, 12412), (2140, 9686), (3103, 6680), (3340, 6206), (4280, 4843)]