287489980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1\times {\mathrm{557}}^1$

素因数の和:894

約数の個数: 48

約数和(自身を含む): 612523296

約数和(自身を除く): 325033316

約数列:

[1, 2, 4, 5, 10, 20, 131, 197, 262, 394, 524, 557, 655, 788, 985, 1114, 1310, 1970, 2228, 2620, 2785, 3940, 5570, 11140, 25807, 51614, 72967, 103228, 109729, 129035, 145934, 219458, 258070, 291868, 364835, 438916, 516140, 548645, 729670, 1097290, 1459340, 2194580, 14374499, 28748998, 57497996, 71872495, 143744990, 287489980]

約数ペア:

[(1, 287489980), (2, 143744990), (4, 71872495), (5, 57497996), (10, 28748998), (20, 14374499), (131, 2194580), (197, 1459340), (262, 1097290), (394, 729670), (524, 548645), (557, 516140), (655, 438916), (788, 364835), (985, 291868), (1114, 258070), (1310, 219458), (1970, 145934), (2228, 129035), (2620, 109729), (2785, 103228), (3940, 72967), (5570, 51614), (11140, 25807)]