129825680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{39581}}^1$

素因数の和:39635

約数の個数: 40

約数和(自身を含む): 309214584

約数和(自身を除く): 179388904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 39581, 79162, 158324, 197905, 316648, 395810, 633296, 791620, 1583240, 1622821, 3166480, 3245642, 6491284, 8114105, 12982568, 16228210, 25965136, 32456420, 64912840, 129825680]

約数ペア:

[(1, 129825680), (2, 64912840), (4, 32456420), (5, 25965136), (8, 16228210), (10, 12982568), (16, 8114105), (20, 6491284), (40, 3245642), (41, 3166480), (80, 1622821), (82, 1583240), (164, 791620), (205, 633296), (328, 395810), (410, 316648), (656, 197905), (820, 158324), (1640, 79162), (3280, 39581)]