81335240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{3677}}^1$

素因数の和:3774

約数の個数: 64

約数和(自身を含む): 211852800

約数和(自身を除く): 130517560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 1106, 1580, 2212, 2765, 3160, 3677, 4424, 5530, 7354, 11060, 14708, 18385, 22120, 25739, 29416, 36770, 51478, 73540, 102956, 128695, 147080, 205912, 257390, 290483, 514780, 580966, 1029560, 1161932, 1452415, 2033381, 2323864, 2904830, 4066762, 5809660, 8133524, 10166905, 11619320, 16267048, 20333810, 40667620, 81335240]

約数ペア:

[(1, 81335240), (2, 40667620), (4, 20333810), (5, 16267048), (7, 11619320), (8, 10166905), (10, 8133524), (14, 5809660), (20, 4066762), (28, 2904830), (35, 2323864), (40, 2033381), (56, 1452415), (70, 1161932), (79, 1029560), (140, 580966), (158, 514780), (280, 290483), (316, 257390), (395, 205912), (553, 147080), (632, 128695), (790, 102956), (1106, 73540), (1580, 51478), (2212, 36770), (2765, 29416), (3160, 25739), (3677, 22120), (4424, 18385), (5530, 14708), (7354, 11060)]