217355325

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:635

約数の個数: 72

約数和(自身を含む): 404911584

約数和(自身を除く): 187556259

約数列:

[1, 3, 5, 11, 15, 25, 33, 43, 55, 75, 121, 129, 165, 215, 275, 363, 473, 557, 605, 645, 825, 1075, 1419, 1671, 1815, 2365, 2785, 3025, 3225, 5203, 6127, 7095, 8355, 9075, 11825, 13925, 15609, 18381, 23951, 26015, 30635, 35475, 41775, 67397, 71853, 78045, 91905, 119755, 130075, 153175, 202191, 263461, 336985, 359265, 390225, 459525, 598775, 790383, 1010955, 1317305, 1684925, 1796325, 2898071, 3951915, 5054775, 6586525, 8694213, 14490355, 19759575, 43471065, 72451775, 217355325]

約数ペア:

[(1, 217355325), (3, 72451775), (5, 43471065), (11, 19759575), (15, 14490355), (25, 8694213), (33, 6586525), (43, 5054775), (55, 3951915), (75, 2898071), (121, 1796325), (129, 1684925), (165, 1317305), (215, 1010955), (275, 790383), (363, 598775), (473, 459525), (557, 390225), (605, 359265), (645, 336985), (825, 263461), (1075, 202191), (1419, 153175), (1671, 130075), (1815, 119755), (2365, 91905), (2785, 78045), (3025, 71853), (3225, 67397), (5203, 41775), (6127, 35475), (7095, 30635), (8355, 26015), (9075, 23951), (11825, 18381), (13925, 15609)]