19901475

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:98

約数の個数: 108

約数和(自身を含む): 42450408

約数和(自身を除く): 22548933

約数列:

[1, 3, 5, 9, 11, 15, 17, 25, 33, 43, 45, 51, 55, 75, 85, 99, 121, 129, 153, 165, 187, 215, 225, 255, 275, 363, 387, 425, 473, 495, 561, 605, 645, 731, 765, 825, 935, 1075, 1089, 1275, 1419, 1683, 1815, 1935, 2057, 2193, 2365, 2475, 2805, 3025, 3225, 3655, 3825, 4257, 4675, 5203, 5445, 6171, 6579, 7095, 8041, 8415, 9075, 9675, 10285, 10965, 11825, 14025, 15609, 18275, 18513, 21285, 24123, 26015, 27225, 30855, 32895, 35475, 40205, 42075, 46827, 51425, 54825, 72369, 78045, 88451, 92565, 106425, 120615, 130075, 154275, 164475, 201025, 234135, 265353, 361845, 390225, 442255, 462825, 603075, 796059, 1170675, 1326765, 1809225, 2211275, 3980295, 6633825, 19901475]

約数ペア:

[(1, 19901475), (3, 6633825), (5, 3980295), (9, 2211275), (11, 1809225), (15, 1326765), (17, 1170675), (25, 796059), (33, 603075), (43, 462825), (45, 442255), (51, 390225), (55, 361845), (75, 265353), (85, 234135), (99, 201025), (121, 164475), (129, 154275), (153, 130075), (165, 120615), (187, 106425), (215, 92565), (225, 88451), (255, 78045), (275, 72369), (363, 54825), (387, 51425), (425, 46827), (473, 42075), (495, 40205), (561, 35475), (605, 32895), (645, 30855), (731, 27225), (765, 26015), (825, 24123), (935, 21285), (1075, 18513), (1089, 18275), (1275, 15609), (1419, 14025), (1683, 11825), (1815, 10965), (1935, 10285), (2057, 9675), (2193, 9075), (2365, 8415), (2475, 8041), (2805, 7095), (3025, 6579), (3225, 6171), (3655, 5445), (3825, 5203), (4257, 4675)]