21757620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:369

約数の個数: 96

約数和(自身を含む): 65536128

約数和(自身を除く): 43778508

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 83, 85, 102, 166, 170, 204, 249, 255, 257, 332, 340, 415, 498, 510, 514, 771, 830, 996, 1020, 1028, 1245, 1285, 1411, 1542, 1660, 2490, 2570, 2822, 3084, 3855, 4233, 4369, 4980, 5140, 5644, 7055, 7710, 8466, 8738, 13107, 14110, 15420, 16932, 17476, 21165, 21331, 21845, 26214, 28220, 42330, 42662, 43690, 52428, 63993, 65535, 84660, 85324, 87380, 106655, 127986, 131070, 213310, 255972, 262140, 319965, 362627, 426620, 639930, 725254, 1087881, 1279860, 1450508, 1813135, 2175762, 3626270, 4351524, 5439405, 7252540, 10878810, 21757620]

約数ペア:

[(1, 21757620), (2, 10878810), (3, 7252540), (4, 5439405), (5, 4351524), (6, 3626270), (10, 2175762), (12, 1813135), (15, 1450508), (17, 1279860), (20, 1087881), (30, 725254), (34, 639930), (51, 426620), (60, 362627), (68, 319965), (83, 262140), (85, 255972), (102, 213310), (166, 131070), (170, 127986), (204, 106655), (249, 87380), (255, 85324), (257, 84660), (332, 65535), (340, 63993), (415, 52428), (498, 43690), (510, 42662), (514, 42330), (771, 28220), (830, 26214), (996, 21845), (1020, 21331), (1028, 21165), (1245, 17476), (1285, 16932), (1411, 15420), (1542, 14110), (1660, 13107), (2490, 8738), (2570, 8466), (2822, 7710), (3084, 7055), (3855, 5644), (4233, 5140), (4369, 4980)]