21879650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{821}}^1$

素因数の和:887

約数の個数: 48

約数和(自身を含む): 44950248

約数和(自身を除く): 23070598

約数列:

[1, 2, 5, 10, 13, 25, 26, 41, 50, 65, 82, 130, 205, 325, 410, 533, 650, 821, 1025, 1066, 1642, 2050, 2665, 4105, 5330, 8210, 10673, 13325, 20525, 21346, 26650, 33661, 41050, 53365, 67322, 106730, 168305, 266825, 336610, 437593, 533650, 841525, 875186, 1683050, 2187965, 4375930, 10939825, 21879650]

約数ペア:

[(1, 21879650), (2, 10939825), (5, 4375930), (10, 2187965), (13, 1683050), (25, 875186), (26, 841525), (41, 533650), (50, 437593), (65, 336610), (82, 266825), (130, 168305), (205, 106730), (325, 67322), (410, 53365), (533, 41050), (650, 33661), (821, 26650), (1025, 21346), (1066, 20525), (1642, 13325), (2050, 10673), (2665, 8210), (4105, 5330)]