21785120

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{367}}^1$

素因数の和:442

約数の個数: 96

約数和(自身を含む): 60092928

約数和(自身を除く): 38307808

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 53, 56, 70, 80, 106, 112, 140, 160, 212, 224, 265, 280, 367, 371, 424, 530, 560, 734, 742, 848, 1060, 1120, 1468, 1484, 1696, 1835, 1855, 2120, 2569, 2936, 2968, 3670, 3710, 4240, 5138, 5872, 5936, 7340, 7420, 8480, 10276, 11744, 11872, 12845, 14680, 14840, 19451, 20552, 25690, 29360, 29680, 38902, 41104, 51380, 58720, 59360, 77804, 82208, 97255, 102760, 136157, 155608, 194510, 205520, 272314, 311216, 389020, 411040, 544628, 622432, 680785, 778040, 1089256, 1361570, 1556080, 2178512, 2723140, 3112160, 4357024, 5446280, 10892560, 21785120]

約数ペア:

[(1, 21785120), (2, 10892560), (4, 5446280), (5, 4357024), (7, 3112160), (8, 2723140), (10, 2178512), (14, 1556080), (16, 1361570), (20, 1089256), (28, 778040), (32, 680785), (35, 622432), (40, 544628), (53, 411040), (56, 389020), (70, 311216), (80, 272314), (106, 205520), (112, 194510), (140, 155608), (160, 136157), (212, 102760), (224, 97255), (265, 82208), (280, 77804), (367, 59360), (371, 58720), (424, 51380), (530, 41104), (560, 38902), (734, 29680), (742, 29360), (848, 25690), (1060, 20552), (1120, 19451), (1468, 14840), (1484, 14680), (1696, 12845), (1835, 11872), (1855, 11744), (2120, 10276), (2569, 8480), (2936, 7420), (2968, 7340), (3670, 5936), (3710, 5872), (4240, 5138)]