21396260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{269}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 46675440

約数和(自身を除く): 25279180

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 97, 164, 194, 205, 269, 388, 410, 485, 538, 820, 970, 1076, 1345, 1940, 2690, 3977, 5380, 7954, 11029, 15908, 19885, 22058, 26093, 39770, 44116, 52186, 55145, 79540, 104372, 110290, 130465, 220580, 260930, 521860, 1069813, 2139626, 4279252, 5349065, 10698130, 21396260]

約数ペア:

[(1, 21396260), (2, 10698130), (4, 5349065), (5, 4279252), (10, 2139626), (20, 1069813), (41, 521860), (82, 260930), (97, 220580), (164, 130465), (194, 110290), (205, 104372), (269, 79540), (388, 55145), (410, 52186), (485, 44116), (538, 39770), (820, 26093), (970, 22058), (1076, 19885), (1345, 15908), (1940, 11029), (2690, 7954), (3977, 5380)]