20981505280

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{712687}}^1$

素因数の和:712731

約数の個数: 72

約数和(自身を含む): 52442433792

約数和(自身を除く): 31460928512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 736, 920, 1280, 1472, 1840, 2944, 3680, 5888, 7360, 14720, 29440, 712687, 1425374, 2850748, 3563435, 5701496, 7126870, 11402992, 14253740, 16391801, 22805984, 28507480, 32783602, 45611968, 57014960, 65567204, 81959005, 91223936, 114029920, 131134408, 163918010, 182447872, 228059840, 262268816, 327836020, 456119680, 524537632, 655672040, 912239360, 1049075264, 1311344080, 2098150528, 2622688160, 4196301056, 5245376320, 10490752640, 20981505280]

約数ペア:

[(1, 20981505280), (2, 10490752640), (4, 5245376320), (5, 4196301056), (8, 2622688160), (10, 2098150528), (16, 1311344080), (20, 1049075264), (23, 912239360), (32, 655672040), (40, 524537632), (46, 456119680), (64, 327836020), (80, 262268816), (92, 228059840), (115, 182447872), (128, 163918010), (160, 131134408), (184, 114029920), (230, 91223936), (256, 81959005), (320, 65567204), (368, 57014960), (460, 45611968), (640, 32783602), (736, 28507480), (920, 22805984), (1280, 16391801), (1472, 14253740), (1840, 11402992), (2944, 7126870), (3680, 5701496), (5888, 3563435), (7360, 2850748), (14720, 1425374), (29440, 712687)]