21981136

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{211}}^1\times {\mathrm{383}}^1$

素因数の和:619

約数の個数: 40

約数和(自身を含む): 45425664

約数和(自身を除く): 23444528

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 211, 272, 383, 422, 766, 844, 1532, 1688, 3064, 3376, 3587, 6128, 6511, 7174, 13022, 14348, 26044, 28696, 52088, 57392, 80813, 104176, 161626, 323252, 646504, 1293008, 1373821, 2747642, 5495284, 10990568, 21981136]

約数ペア:

[(1, 21981136), (2, 10990568), (4, 5495284), (8, 2747642), (16, 1373821), (17, 1293008), (34, 646504), (68, 323252), (136, 161626), (211, 104176), (272, 80813), (383, 57392), (422, 52088), (766, 28696), (844, 26044), (1532, 14348), (1688, 13022), (3064, 7174), (3376, 6511), (3587, 6128)]