128580080

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{18059}}^1$

素因数の和:18161

約数の個数: 40

約数和(自身を含む): 302324400

約数和(自身を除く): 173744320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 18059, 36118, 72236, 90295, 144472, 180590, 288944, 361180, 722360, 1444720, 1607251, 3214502, 6429004, 8036255, 12858008, 16072510, 25716016, 32145020, 64290040, 128580080]

約数ペア:

[(1, 128580080), (2, 64290040), (4, 32145020), (5, 25716016), (8, 16072510), (10, 12858008), (16, 8036255), (20, 6429004), (40, 3214502), (80, 1607251), (89, 1444720), (178, 722360), (356, 361180), (445, 288944), (712, 180590), (890, 144472), (1424, 90295), (1780, 72236), (3560, 36118), (7120, 18059)]