21045280

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4243}}^1$

素因数の和:4289

約数の個数: 48

約数和(自身を含む): 51335424

約数和(自身を除く): 30290144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4243, 4960, 8486, 16972, 21215, 33944, 42430, 67888, 84860, 131533, 135776, 169720, 263066, 339440, 526132, 657665, 678880, 1052264, 1315330, 2104528, 2630660, 4209056, 5261320, 10522640, 21045280]

約数ペア:

[(1, 21045280), (2, 10522640), (4, 5261320), (5, 4209056), (8, 2630660), (10, 2104528), (16, 1315330), (20, 1052264), (31, 678880), (32, 657665), (40, 526132), (62, 339440), (80, 263066), (124, 169720), (155, 135776), (160, 131533), (248, 84860), (310, 67888), (496, 42430), (620, 33944), (992, 21215), (1240, 16972), (2480, 8486), (4243, 4960)]