20560280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2081}}^1$

素因数の和:2124

約数の個数: 64

約数和(自身を含む): 52466400

約数和(自身を除く): 31906120

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2081, 2470, 4162, 4940, 8324, 9880, 10405, 16648, 20810, 27053, 39539, 41620, 54106, 79078, 83240, 108212, 135265, 158156, 197695, 216424, 270530, 316312, 395390, 514007, 541060, 790780, 1028014, 1082120, 1581560, 2056028, 2570035, 4112056, 5140070, 10280140, 20560280]

約数ペア:

[(1, 20560280), (2, 10280140), (4, 5140070), (5, 4112056), (8, 2570035), (10, 2056028), (13, 1581560), (19, 1082120), (20, 1028014), (26, 790780), (38, 541060), (40, 514007), (52, 395390), (65, 316312), (76, 270530), (95, 216424), (104, 197695), (130, 158156), (152, 135265), (190, 108212), (247, 83240), (260, 79078), (380, 54106), (494, 41620), (520, 39539), (760, 27053), (988, 20810), (1235, 16648), (1976, 10405), (2081, 9880), (2470, 8324), (4162, 4940)]