20868580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{347}}^1$

素因数の和:484

約数の個数: 48

約数和(自身を含む): 45835776

約数和(自身を除く): 24967196

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 97, 124, 155, 194, 310, 347, 388, 485, 620, 694, 970, 1388, 1735, 1940, 3007, 3470, 6014, 6940, 10757, 12028, 15035, 21514, 30070, 33659, 43028, 53785, 60140, 67318, 107570, 134636, 168295, 215140, 336590, 673180, 1043429, 2086858, 4173716, 5217145, 10434290, 20868580]

約数ペア:

[(1, 20868580), (2, 10434290), (4, 5217145), (5, 4173716), (10, 2086858), (20, 1043429), (31, 673180), (62, 336590), (97, 215140), (124, 168295), (155, 134636), (194, 107570), (310, 67318), (347, 60140), (388, 53785), (485, 43028), (620, 33659), (694, 30070), (970, 21514), (1388, 15035), (1735, 12028), (1940, 10757), (3007, 6940), (3470, 6014)]