21546225

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 42131232

約数和(自身を除く): 20585007

約数列:

[1, 3, 5, 9, 15, 17, 25, 43, 45, 51, 75, 85, 129, 131, 153, 215, 225, 255, 387, 393, 425, 645, 655, 731, 765, 1075, 1179, 1275, 1935, 1965, 2193, 2227, 3225, 3275, 3655, 3825, 5633, 5895, 6579, 6681, 9675, 9825, 10965, 11135, 16899, 18275, 20043, 28165, 29475, 32895, 33405, 50697, 54825, 55675, 84495, 95761, 100215, 140825, 164475, 167025, 253485, 287283, 422475, 478805, 501075, 861849, 1267425, 1436415, 2394025, 4309245, 7182075, 21546225]

約数ペア:

[(1, 21546225), (3, 7182075), (5, 4309245), (9, 2394025), (15, 1436415), (17, 1267425), (25, 861849), (43, 501075), (45, 478805), (51, 422475), (75, 287283), (85, 253485), (129, 167025), (131, 164475), (153, 140825), (215, 100215), (225, 95761), (255, 84495), (387, 55675), (393, 54825), (425, 50697), (645, 33405), (655, 32895), (731, 29475), (765, 28165), (1075, 20043), (1179, 18275), (1275, 16899), (1935, 11135), (1965, 10965), (2193, 9825), (2227, 9675), (3225, 6681), (3275, 6579), (3655, 5895), (3825, 5633)]