1298020000

素因数分解:

$2^5\times 5^4\times {\mathrm{64901}}^1$

素因数の和:64931

約数の個数: 60

約数和(自身を含む): 3193373106

約数和(自身を除く): 1895353106

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 2000, 2500, 4000, 5000, 10000, 20000, 64901, 129802, 259604, 324505, 519208, 649010, 1038416, 1298020, 1622525, 2076832, 2596040, 3245050, 5192080, 6490100, 8112625, 10384160, 12980200, 16225250, 25960400, 32450500, 40563125, 51920800, 64901000, 81126250, 129802000, 162252500, 259604000, 324505000, 649010000, 1298020000]

約数ペア:

[(1, 1298020000), (2, 649010000), (4, 324505000), (5, 259604000), (8, 162252500), (10, 129802000), (16, 81126250), (20, 64901000), (25, 51920800), (32, 40563125), (40, 32450500), (50, 25960400), (80, 16225250), (100, 12980200), (125, 10384160), (160, 8112625), (200, 6490100), (250, 5192080), (400, 3245050), (500, 2596040), (625, 2076832), (800, 1622525), (1000, 1298020), (1250, 1038416), (2000, 649010), (2500, 519208), (4000, 324505), (5000, 259604), (10000, 129802), (20000, 64901)]