21282205

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:313

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9130595

約数列:

[1, 5, 7, 35, 43, 79, 179, 215, 301, 395, 553, 895, 1253, 1505, 2765, 3397, 6265, 7697, 14141, 16985, 23779, 38485, 53879, 70705, 98987, 118895, 269395, 494935, 608063, 3040315, 4256441, 21282205]

約数ペア:

[(1, 21282205), (5, 4256441), (7, 3040315), (35, 608063), (43, 494935), (79, 269395), (179, 118895), (215, 98987), (301, 70705), (395, 53879), (553, 38485), (895, 23779), (1253, 16985), (1505, 14141), (2765, 7697), (3397, 6265)]