128657440

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{25939}}^1$

素因数の和:25985

約数の個数: 48

約数和(自身を含む): 313770240

約数和(自身を除く): 185112800

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, 4960, 25939, 51878, 103756, 129695, 207512, 259390, 415024, 518780, 804109, 830048, 1037560, 1608218, 2075120, 3216436, 4020545, 4150240, 6432872, 8041090, 12865744, 16082180, 25731488, 32164360, 64328720, 128657440]

約数ペア:

[(1, 128657440), (2, 64328720), (4, 32164360), (5, 25731488), (8, 16082180), (10, 12865744), (16, 8041090), (20, 6432872), (31, 4150240), (32, 4020545), (40, 3216436), (62, 2075120), (80, 1608218), (124, 1037560), (155, 830048), (160, 804109), (248, 518780), (310, 415024), (496, 259390), (620, 207512), (992, 129695), (1240, 103756), (2480, 51878), (4960, 25939)]