28787980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{421}}^1$

素因数の和:706

約数の個数: 48

約数和(自身を含む): 65507904

約数和(自身を除く): 36719924

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 263, 421, 526, 842, 1052, 1315, 1684, 2105, 2630, 3419, 4210, 5260, 5473, 6838, 8420, 10946, 13676, 17095, 21892, 27365, 34190, 54730, 68380, 109460, 110723, 221446, 442892, 553615, 1107230, 1439399, 2214460, 2878798, 5757596, 7196995, 14393990, 28787980]

約数ペア:

[(1, 28787980), (2, 14393990), (4, 7196995), (5, 5757596), (10, 2878798), (13, 2214460), (20, 1439399), (26, 1107230), (52, 553615), (65, 442892), (130, 221446), (260, 110723), (263, 109460), (421, 68380), (526, 54730), (842, 34190), (1052, 27365), (1315, 21892), (1684, 17095), (2105, 13676), (2630, 10946), (3419, 8420), (4210, 6838), (5260, 5473)]