21557224

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 46947600

約数和(自身を除く): 25390376

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 89, 104, 136, 137, 178, 221, 274, 356, 442, 548, 712, 884, 1096, 1157, 1513, 1768, 1781, 2314, 2329, 3026, 3562, 4628, 4658, 6052, 7124, 9256, 9316, 12104, 12193, 14248, 18632, 19669, 24386, 30277, 39338, 48772, 60554, 78676, 97544, 121108, 157352, 158509, 207281, 242216, 317018, 414562, 634036, 829124, 1268072, 1658248, 2694653, 5389306, 10778612, 21557224]

約数ペア:

[(1, 21557224), (2, 10778612), (4, 5389306), (8, 2694653), (13, 1658248), (17, 1268072), (26, 829124), (34, 634036), (52, 414562), (68, 317018), (89, 242216), (104, 207281), (136, 158509), (137, 157352), (178, 121108), (221, 97544), (274, 78676), (356, 60554), (442, 48772), (548, 39338), (712, 30277), (884, 24386), (1096, 19669), (1157, 18632), (1513, 14248), (1768, 12193), (1781, 12104), (2314, 9316), (2329, 9256), (3026, 7124), (3562, 6052), (4628, 4658)]