20911240

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{227}}^1$

素因数の和:299

約数の個数: 96

約数和(自身を含む): 56142720

約数和(自身を除く): 35231480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 49, 56, 70, 94, 98, 140, 188, 196, 227, 235, 245, 280, 329, 376, 392, 454, 470, 490, 658, 908, 940, 980, 1135, 1316, 1589, 1645, 1816, 1880, 1960, 2270, 2303, 2632, 3178, 3290, 4540, 4606, 6356, 6580, 7945, 9080, 9212, 10669, 11123, 11515, 12712, 13160, 15890, 18424, 21338, 22246, 23030, 31780, 42676, 44492, 46060, 53345, 55615, 63560, 74683, 85352, 88984, 92120, 106690, 111230, 149366, 213380, 222460, 298732, 373415, 426760, 444920, 522781, 597464, 746830, 1045562, 1493660, 2091124, 2613905, 2987320, 4182248, 5227810, 10455620, 20911240]

約数ペア:

[(1, 20911240), (2, 10455620), (4, 5227810), (5, 4182248), (7, 2987320), (8, 2613905), (10, 2091124), (14, 1493660), (20, 1045562), (28, 746830), (35, 597464), (40, 522781), (47, 444920), (49, 426760), (56, 373415), (70, 298732), (94, 222460), (98, 213380), (140, 149366), (188, 111230), (196, 106690), (227, 92120), (235, 88984), (245, 85352), (280, 74683), (329, 63560), (376, 55615), (392, 53345), (454, 46060), (470, 44492), (490, 42676), (658, 31780), (908, 23030), (940, 22246), (980, 21338), (1135, 18424), (1316, 15890), (1589, 13160), (1645, 12712), (1816, 11515), (1880, 11123), (1960, 10669), (2270, 9212), (2303, 9080), (2632, 7945), (3178, 6580), (3290, 6356), (4540, 4606)]