21686925

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 40845600

約数和(自身を除く): 19158675

約数列:

[1, 3, 5, 13, 15, 25, 29, 39, 59, 65, 75, 87, 145, 169, 177, 195, 295, 325, 377, 435, 507, 725, 767, 845, 885, 975, 1131, 1475, 1711, 1885, 2175, 2301, 2535, 3835, 4225, 4425, 4901, 5133, 5655, 8555, 9425, 9971, 11505, 12675, 14703, 19175, 22243, 24505, 25665, 28275, 29913, 42775, 49855, 57525, 66729, 73515, 111215, 122525, 128325, 149565, 249275, 289159, 333645, 367575, 556075, 747825, 867477, 1445795, 1668225, 4337385, 7228975, 21686925]

約数ペア:

[(1, 21686925), (3, 7228975), (5, 4337385), (13, 1668225), (15, 1445795), (25, 867477), (29, 747825), (39, 556075), (59, 367575), (65, 333645), (75, 289159), (87, 249275), (145, 149565), (169, 128325), (177, 122525), (195, 111215), (295, 73515), (325, 66729), (377, 57525), (435, 49855), (507, 42775), (725, 29913), (767, 28275), (845, 25665), (885, 24505), (975, 22243), (1131, 19175), (1475, 14703), (1711, 12675), (1885, 11505), (2175, 9971), (2301, 9425), (2535, 8555), (3835, 5655), (4225, 5133), (4425, 4901)]