21451040

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10313}}^1$

素因数の和:10341

約数の個数: 48

約数和(自身を含む): 54581688

約数和(自身を除く): 33130648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10313, 20626, 41252, 51565, 82504, 103130, 134069, 165008, 206260, 268138, 330016, 412520, 536276, 670345, 825040, 1072552, 1340690, 1650080, 2145104, 2681380, 4290208, 5362760, 10725520, 21451040]

約数ペア:

[(1, 21451040), (2, 10725520), (4, 5362760), (5, 4290208), (8, 2681380), (10, 2145104), (13, 1650080), (16, 1340690), (20, 1072552), (26, 825040), (32, 670345), (40, 536276), (52, 412520), (65, 330016), (80, 268138), (104, 206260), (130, 165008), (160, 134069), (208, 103130), (260, 82504), (416, 51565), (520, 41252), (1040, 20626), (2080, 10313)]