51978320

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{20959}}^1$

素因数の和:21003

約数の個数: 40

約数和(自身を含む): 124753920

約数和(自身を除く): 72775600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 20959, 41918, 83836, 104795, 167672, 209590, 335344, 419180, 649729, 838360, 1299458, 1676720, 2598916, 3248645, 5197832, 6497290, 10395664, 12994580, 25989160, 51978320]

約数ペア:

[(1, 51978320), (2, 25989160), (4, 12994580), (5, 10395664), (8, 6497290), (10, 5197832), (16, 3248645), (20, 2598916), (31, 1676720), (40, 1299458), (62, 838360), (80, 649729), (124, 419180), (155, 335344), (248, 209590), (310, 167672), (496, 104795), (620, 83836), (1240, 41918), (2480, 20959)]