21355020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4091}}^1$

素因数の和:4135

約数の個数: 72

約数和(自身を含む): 67026960

約数和(自身を除く): 45671940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 4091, 5220, 8182, 12273, 16364, 20455, 24546, 36819, 40910, 49092, 61365, 73638, 81820, 118639, 122730, 147276, 184095, 237278, 245460, 355917, 368190, 474556, 593195, 711834, 736380, 1067751, 1186390, 1423668, 1779585, 2135502, 2372780, 3559170, 4271004, 5338755, 7118340, 10677510, 21355020]

約数ペア:

[(1, 21355020), (2, 10677510), (3, 7118340), (4, 5338755), (5, 4271004), (6, 3559170), (9, 2372780), (10, 2135502), (12, 1779585), (15, 1423668), (18, 1186390), (20, 1067751), (29, 736380), (30, 711834), (36, 593195), (45, 474556), (58, 368190), (60, 355917), (87, 245460), (90, 237278), (116, 184095), (145, 147276), (174, 122730), (180, 118639), (261, 81820), (290, 73638), (348, 61365), (435, 49092), (522, 40910), (580, 36819), (870, 24546), (1044, 20455), (1305, 16364), (1740, 12273), (2610, 8182), (4091, 5220)]