212815775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{557}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 298909440

約数和(自身を除く): 86093665

約数列:

[1, 5, 17, 25, 29, 31, 85, 145, 155, 425, 493, 527, 557, 725, 775, 899, 2465, 2635, 2785, 4495, 9469, 12325, 13175, 13925, 15283, 16153, 17267, 22475, 47345, 76415, 80765, 86335, 236725, 274601, 293539, 382075, 403825, 431675, 500743, 1373005, 1467695, 2503715, 6865025, 7338475, 8512631, 12518575, 42563155, 212815775]

約数ペア:

[(1, 212815775), (5, 42563155), (17, 12518575), (25, 8512631), (29, 7338475), (31, 6865025), (85, 2503715), (145, 1467695), (155, 1373005), (425, 500743), (493, 431675), (527, 403825), (557, 382075), (725, 293539), (775, 274601), (899, 236725), (2465, 86335), (2635, 80765), (2785, 76415), (4495, 47345), (9469, 22475), (12325, 17267), (13175, 16153), (13925, 15283)]