21000508812

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{499}}^1\times {\mathrm{28513}}^1$

素因数の和:29063

約数の個数: 72

約数和(自身を含む): 54490254000

約数和(自身を除く): 33489745188

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 82, 123, 164, 246, 369, 492, 499, 738, 998, 1476, 1497, 1996, 2994, 4491, 5988, 8982, 17964, 20459, 28513, 40918, 57026, 61377, 81836, 85539, 114052, 122754, 171078, 184131, 245508, 256617, 342156, 368262, 513234, 736524, 1026468, 1169033, 2338066, 3507099, 4676132, 7014198, 10521297, 14028396, 14227987, 21042594, 28455974, 42085188, 42683961, 56911948, 85367922, 128051883, 170735844, 256103766, 512207532, 583347467, 1166694934, 1750042401, 2333389868, 3500084802, 5250127203, 7000169604, 10500254406, 21000508812]

約数ペア:

[(1, 21000508812), (2, 10500254406), (3, 7000169604), (4, 5250127203), (6, 3500084802), (9, 2333389868), (12, 1750042401), (18, 1166694934), (36, 583347467), (41, 512207532), (82, 256103766), (123, 170735844), (164, 128051883), (246, 85367922), (369, 56911948), (492, 42683961), (499, 42085188), (738, 28455974), (998, 21042594), (1476, 14227987), (1497, 14028396), (1996, 10521297), (2994, 7014198), (4491, 4676132), (5988, 3507099), (8982, 2338066), (17964, 1169033), (20459, 1026468), (28513, 736524), (40918, 513234), (57026, 368262), (61377, 342156), (81836, 256617), (85539, 245508), (114052, 184131), (122754, 171078)]