21084650

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:327

約数の個数: 48

約数和(自身を含む): 41330688

約数和(自身を除く): 20246038

約数列:

[1, 2, 5, 10, 25, 31, 50, 61, 62, 122, 155, 223, 305, 310, 446, 610, 775, 1115, 1525, 1550, 1891, 2230, 3050, 3782, 5575, 6913, 9455, 11150, 13603, 13826, 18910, 27206, 34565, 47275, 68015, 69130, 94550, 136030, 172825, 340075, 345650, 421693, 680150, 843386, 2108465, 4216930, 10542325, 21084650]

約数ペア:

[(1, 21084650), (2, 10542325), (5, 4216930), (10, 2108465), (25, 843386), (31, 680150), (50, 421693), (61, 345650), (62, 340075), (122, 172825), (155, 136030), (223, 94550), (305, 69130), (310, 68015), (446, 47275), (610, 34565), (775, 27206), (1115, 18910), (1525, 13826), (1550, 13603), (1891, 11150), (2230, 9455), (3050, 6913), (3782, 5575)]