21488480

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10331}}^1$

素因数の和:10359

約数の個数: 48

約数和(自身を含む): 54676944

約数和(自身を除く): 33188464

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, 10331, 20662, 41324, 51655, 82648, 103310, 134303, 165296, 206620, 268606, 330592, 413240, 537212, 671515, 826480, 1074424, 1343030, 1652960, 2148848, 2686060, 4297696, 5372120, 10744240, 21488480]

約数ペア:

[(1, 21488480), (2, 10744240), (4, 5372120), (5, 4297696), (8, 2686060), (10, 2148848), (13, 1652960), (16, 1343030), (20, 1074424), (26, 826480), (32, 671515), (40, 537212), (52, 413240), (65, 330592), (80, 268606), (104, 206620), (130, 165296), (160, 134303), (208, 103310), (260, 82648), (416, 51655), (520, 41324), (1040, 20662), (2080, 10331)]