19388925

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 38039976

約数和(自身を除く): 18651051

約数列:

[1, 3, 5, 9, 15, 17, 25, 37, 45, 51, 75, 85, 111, 137, 153, 185, 225, 255, 333, 411, 425, 555, 629, 685, 765, 925, 1233, 1275, 1665, 1887, 2055, 2329, 2775, 3145, 3425, 3825, 5069, 5661, 6165, 6987, 8325, 9435, 10275, 11645, 15207, 15725, 20961, 25345, 28305, 30825, 34935, 45621, 47175, 58225, 76035, 86173, 104805, 126725, 141525, 174675, 228105, 258519, 380175, 430865, 524025, 775557, 1140525, 1292595, 2154325, 3877785, 6462975, 19388925]

約数ペア:

[(1, 19388925), (3, 6462975), (5, 3877785), (9, 2154325), (15, 1292595), (17, 1140525), (25, 775557), (37, 524025), (45, 430865), (51, 380175), (75, 258519), (85, 228105), (111, 174675), (137, 141525), (153, 126725), (185, 104805), (225, 86173), (255, 76035), (333, 58225), (411, 47175), (425, 45621), (555, 34935), (629, 30825), (685, 28305), (765, 25345), (925, 20961), (1233, 15725), (1275, 15207), (1665, 11645), (1887, 10275), (2055, 9435), (2329, 8325), (2775, 6987), (3145, 6165), (3425, 5661), (3825, 5069)]