21940412

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^2\times {\mathrm{251}}^1$

素因数の和:350

約数の個数: 36

約数和(自身を含む): 42551208

約数和(自身を除く): 20610796

約数列:

[1, 2, 4, 13, 26, 41, 52, 82, 164, 251, 502, 533, 1004, 1066, 1681, 2132, 3263, 3362, 6526, 6724, 10291, 13052, 20582, 21853, 41164, 43706, 87412, 133783, 267566, 421931, 535132, 843862, 1687724, 5485103, 10970206, 21940412]

約数ペア:

[(1, 21940412), (2, 10970206), (4, 5485103), (13, 1687724), (26, 843862), (41, 535132), (52, 421931), (82, 267566), (164, 133783), (251, 87412), (502, 43706), (533, 41164), (1004, 21853), (1066, 20582), (1681, 13052), (2132, 10291), (3263, 6724), (3362, 6526)]