21653720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1697}}^1$

素因数の和:1748

約数の個数: 64

約数和(自身を含む): 55015200

約数和(自身を除く): 33361480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1697, 2552, 3190, 3394, 6380, 6788, 8485, 12760, 13576, 16970, 18667, 33940, 37334, 49213, 67880, 74668, 93335, 98426, 149336, 186670, 196852, 246065, 373340, 393704, 492130, 541343, 746680, 984260, 1082686, 1968520, 2165372, 2706715, 4330744, 5413430, 10826860, 21653720]

約数ペア:

[(1, 21653720), (2, 10826860), (4, 5413430), (5, 4330744), (8, 2706715), (10, 2165372), (11, 1968520), (20, 1082686), (22, 984260), (29, 746680), (40, 541343), (44, 492130), (55, 393704), (58, 373340), (88, 246065), (110, 196852), (116, 186670), (145, 149336), (220, 98426), (232, 93335), (290, 74668), (319, 67880), (440, 49213), (580, 37334), (638, 33940), (1160, 18667), (1276, 16970), (1595, 13576), (1697, 12760), (2552, 8485), (3190, 6788), (3394, 6380)]