21611960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{601}}^1$

素因数の和:672

約数の個数: 64

約数和(自身を含む): 52012800

約数和(自身を除く): 30400840

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 31, 40, 58, 62, 116, 124, 145, 155, 232, 248, 290, 310, 580, 601, 620, 899, 1160, 1202, 1240, 1798, 2404, 3005, 3596, 4495, 4808, 6010, 7192, 8990, 12020, 17429, 17980, 18631, 24040, 34858, 35960, 37262, 69716, 74524, 87145, 93155, 139432, 149048, 174290, 186310, 348580, 372620, 540299, 697160, 745240, 1080598, 2161196, 2701495, 4322392, 5402990, 10805980, 21611960]

約数ペア:

[(1, 21611960), (2, 10805980), (4, 5402990), (5, 4322392), (8, 2701495), (10, 2161196), (20, 1080598), (29, 745240), (31, 697160), (40, 540299), (58, 372620), (62, 348580), (116, 186310), (124, 174290), (145, 149048), (155, 139432), (232, 93155), (248, 87145), (290, 74524), (310, 69716), (580, 37262), (601, 35960), (620, 34858), (899, 24040), (1160, 18631), (1202, 17980), (1240, 17429), (1798, 12020), (2404, 8990), (3005, 7192), (3596, 6010), (4495, 4808)]