81581570

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{331}}^1\times {\mathrm{503}}^1$

素因数の和:855

約数の個数: 48

約数和(自身を含む): 171678528

約数和(自身を除く): 90096958

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 331, 490, 503, 662, 1006, 1655, 2317, 2515, 3310, 3521, 4634, 5030, 7042, 11585, 16219, 17605, 23170, 24647, 32438, 35210, 49294, 81095, 123235, 162190, 166493, 246470, 332986, 832465, 1165451, 1664930, 2330902, 5827255, 8158157, 11654510, 16316314, 40790785, 81581570]

約数ペア:

[(1, 81581570), (2, 40790785), (5, 16316314), (7, 11654510), (10, 8158157), (14, 5827255), (35, 2330902), (49, 1664930), (70, 1165451), (98, 832465), (245, 332986), (331, 246470), (490, 166493), (503, 162190), (662, 123235), (1006, 81095), (1655, 49294), (2317, 35210), (2515, 32438), (3310, 24647), (3521, 23170), (4634, 17605), (5030, 16219), (7042, 11585)]