21230416

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{877}}^1$

素因数の和:991

約数の個数: 40

約数和(自身を含む): 44093160

約数和(自身を除く): 22862744

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 89, 136, 178, 272, 356, 712, 877, 1424, 1513, 1754, 3026, 3508, 6052, 7016, 12104, 14032, 14909, 24208, 29818, 59636, 78053, 119272, 156106, 238544, 312212, 624424, 1248848, 1326901, 2653802, 5307604, 10615208, 21230416]

約数ペア:

[(1, 21230416), (2, 10615208), (4, 5307604), (8, 2653802), (16, 1326901), (17, 1248848), (34, 624424), (68, 312212), (89, 238544), (136, 156106), (178, 119272), (272, 78053), (356, 59636), (712, 29818), (877, 24208), (1424, 14909), (1513, 14032), (1754, 12104), (3026, 7016), (3508, 6052)]