218465990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1279}}^1$

素因数の和:1365

約数の個数: 64

約数和(自身を含む): 442368000

約数和(自身を除く): 223902010

約数列:

[1, 2, 5, 10, 19, 29, 31, 38, 58, 62, 95, 145, 155, 190, 290, 310, 551, 589, 899, 1102, 1178, 1279, 1798, 2558, 2755, 2945, 4495, 5510, 5890, 6395, 8990, 12790, 17081, 24301, 34162, 37091, 39649, 48602, 74182, 79298, 85405, 121505, 170810, 185455, 198245, 243010, 370910, 396490, 704729, 753331, 1149821, 1409458, 1506662, 2299642, 3523645, 3766655, 5749105, 7047290, 7533310, 11498210, 21846599, 43693198, 109232995, 218465990]

約数ペア:

[(1, 218465990), (2, 109232995), (5, 43693198), (10, 21846599), (19, 11498210), (29, 7533310), (31, 7047290), (38, 5749105), (58, 3766655), (62, 3523645), (95, 2299642), (145, 1506662), (155, 1409458), (190, 1149821), (290, 753331), (310, 704729), (551, 396490), (589, 370910), (899, 243010), (1102, 198245), (1178, 185455), (1279, 170810), (1798, 121505), (2558, 85405), (2755, 79298), (2945, 74182), (4495, 48602), (5510, 39649), (5890, 37091), (6395, 34162), (8990, 24301), (12790, 17081)]