21542115

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:161

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 19929885

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 53, 79, 105, 147, 159, 237, 245, 265, 343, 371, 395, 553, 735, 795, 1029, 1113, 1185, 1659, 1715, 1855, 2597, 2765, 3871, 4187, 5145, 5565, 7791, 8295, 11613, 12561, 12985, 18179, 19355, 20935, 27097, 29309, 38955, 54537, 58065, 62805, 81291, 87927, 90895, 135485, 146545, 205163, 272685, 406455, 439635, 615489, 1025815, 1436141, 3077445, 4308423, 7180705, 21542115]

約数ペア:

[(1, 21542115), (3, 7180705), (5, 4308423), (7, 3077445), (15, 1436141), (21, 1025815), (35, 615489), (49, 439635), (53, 406455), (79, 272685), (105, 205163), (147, 146545), (159, 135485), (237, 90895), (245, 87927), (265, 81291), (343, 62805), (371, 58065), (395, 54537), (553, 38955), (735, 29309), (795, 27097), (1029, 20935), (1113, 19355), (1185, 18179), (1659, 12985), (1715, 12561), (1855, 11613), (2597, 8295), (2765, 7791), (3871, 5565), (4187, 5145)]