21163815

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{223}}^1$

素因数の和:293

約数の個数: 64

約数和(自身を含む): 40857600

約数和(自身を除く): 19693785

約数列:

[1, 3, 5, 9, 15, 19, 27, 37, 45, 57, 95, 111, 135, 171, 185, 223, 285, 333, 513, 555, 669, 703, 855, 999, 1115, 1665, 2007, 2109, 2565, 3345, 3515, 4237, 4995, 6021, 6327, 8251, 10035, 10545, 12711, 18981, 21185, 24753, 30105, 31635, 38133, 41255, 63555, 74259, 94905, 114399, 123765, 156769, 190665, 222777, 371295, 470307, 571995, 783845, 1113885, 1410921, 2351535, 4232763, 7054605, 21163815]

約数ペア:

[(1, 21163815), (3, 7054605), (5, 4232763), (9, 2351535), (15, 1410921), (19, 1113885), (27, 783845), (37, 571995), (45, 470307), (57, 371295), (95, 222777), (111, 190665), (135, 156769), (171, 123765), (185, 114399), (223, 94905), (285, 74259), (333, 63555), (513, 41255), (555, 38133), (669, 31635), (703, 30105), (855, 24753), (999, 21185), (1115, 18981), (1665, 12711), (2007, 10545), (2109, 10035), (2565, 8251), (3345, 6327), (3515, 6021), (4237, 4995)]