81257855

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1\times {\mathrm{359}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 116121600

約数和(自身を除く): 34863745

約数列:

[1, 5, 7, 29, 35, 145, 203, 223, 359, 1015, 1115, 1561, 1795, 2513, 6467, 7805, 10411, 12565, 32335, 45269, 52055, 72877, 80057, 226345, 364385, 400285, 560399, 2321653, 2801995, 11608265, 16251571, 81257855]

約数ペア:

[(1, 81257855), (5, 16251571), (7, 11608265), (29, 2801995), (35, 2321653), (145, 560399), (203, 400285), (223, 364385), (359, 226345), (1015, 80057), (1115, 72877), (1561, 52055), (1795, 45269), (2513, 32335), (6467, 12565), (7805, 10411)]