643856960

素因数分解:

$2^6\times 5^1\times {\mathrm{257}}^1\times {\mathrm{7829}}^1$

素因数の和:8103

約数の個数: 56

約数和(自身を含む): 1539346680

約数和(自身を除く): 895489720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 257, 320, 514, 1028, 1285, 2056, 2570, 4112, 5140, 7829, 8224, 10280, 15658, 16448, 20560, 31316, 39145, 41120, 62632, 78290, 82240, 125264, 156580, 250528, 313160, 501056, 626320, 1252640, 2012053, 2505280, 4024106, 8048212, 10060265, 16096424, 20120530, 32192848, 40241060, 64385696, 80482120, 128771392, 160964240, 321928480, 643856960]

約数ペア:

[(1, 643856960), (2, 321928480), (4, 160964240), (5, 128771392), (8, 80482120), (10, 64385696), (16, 40241060), (20, 32192848), (32, 20120530), (40, 16096424), (64, 10060265), (80, 8048212), (160, 4024106), (257, 2505280), (320, 2012053), (514, 1252640), (1028, 626320), (1285, 501056), (2056, 313160), (2570, 250528), (4112, 156580), (5140, 125264), (7829, 82240), (8224, 78290), (10280, 62632), (15658, 41120), (16448, 39145), (20560, 31316)]