21813975

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1901}}^1$

素因数の和:1937

約数の個数: 48

約数和(自身を含む): 42452640

約数和(自身を除く): 20638665

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 135, 153, 225, 255, 425, 459, 675, 765, 1275, 1901, 2295, 3825, 5703, 9505, 11475, 17109, 28515, 32317, 47525, 51327, 85545, 96951, 142575, 161585, 256635, 290853, 427725, 484755, 807925, 872559, 1283175, 1454265, 2423775, 4362795, 7271325, 21813975]

約数ペア:

[(1, 21813975), (3, 7271325), (5, 4362795), (9, 2423775), (15, 1454265), (17, 1283175), (25, 872559), (27, 807925), (45, 484755), (51, 427725), (75, 290853), (85, 256635), (135, 161585), (153, 142575), (225, 96951), (255, 85545), (425, 51327), (459, 47525), (675, 32317), (765, 28515), (1275, 17109), (1901, 11475), (2295, 9505), (3825, 5703)]