81479020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:287

約数の個数: 96

約数和(自身を含む): 203212800

約数和(自身を除く): 121733780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 79, 106, 139, 140, 158, 212, 265, 278, 316, 371, 395, 530, 553, 556, 695, 742, 790, 973, 1060, 1106, 1390, 1484, 1580, 1855, 1946, 2212, 2765, 2780, 3710, 3892, 4187, 4865, 5530, 7367, 7420, 8374, 9730, 10981, 11060, 14734, 16748, 19460, 20935, 21962, 29309, 29468, 36835, 41870, 43924, 51569, 54905, 58618, 73670, 76867, 83740, 103138, 109810, 117236, 146545, 147340, 153734, 206276, 219620, 257845, 293090, 307468, 384335, 515690, 581993, 586180, 768670, 1031380, 1163986, 1537340, 2327972, 2909965, 4073951, 5819930, 8147902, 11639860, 16295804, 20369755, 40739510, 81479020]

約数ペア:

[(1, 81479020), (2, 40739510), (4, 20369755), (5, 16295804), (7, 11639860), (10, 8147902), (14, 5819930), (20, 4073951), (28, 2909965), (35, 2327972), (53, 1537340), (70, 1163986), (79, 1031380), (106, 768670), (139, 586180), (140, 581993), (158, 515690), (212, 384335), (265, 307468), (278, 293090), (316, 257845), (371, 219620), (395, 206276), (530, 153734), (553, 147340), (556, 146545), (695, 117236), (742, 109810), (790, 103138), (973, 83740), (1060, 76867), (1106, 73670), (1390, 58618), (1484, 54905), (1580, 51569), (1855, 43924), (1946, 41870), (2212, 36835), (2765, 29468), (2780, 29309), (3710, 21962), (3892, 20935), (4187, 19460), (4865, 16748), (5530, 14734), (7367, 11060), (7420, 10981), (8374, 9730)]