31815225

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 62626200

約数和(自身を除く): 30810975

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 73, 75, 117, 149, 195, 219, 225, 325, 365, 447, 585, 657, 745, 949, 975, 1095, 1341, 1825, 1937, 2235, 2847, 2925, 3285, 3725, 4745, 5475, 5811, 6705, 8541, 9685, 10877, 11175, 14235, 16425, 17433, 23725, 29055, 32631, 33525, 42705, 48425, 54385, 71175, 87165, 97893, 141401, 145275, 163155, 213525, 271925, 424203, 435825, 489465, 707005, 815775, 1272609, 2121015, 2447325, 3535025, 6363045, 10605075, 31815225]

約数ペア:

[(1, 31815225), (3, 10605075), (5, 6363045), (9, 3535025), (13, 2447325), (15, 2121015), (25, 1272609), (39, 815775), (45, 707005), (65, 489465), (73, 435825), (75, 424203), (117, 271925), (149, 213525), (195, 163155), (219, 145275), (225, 141401), (325, 97893), (365, 87165), (447, 71175), (585, 54385), (657, 48425), (745, 42705), (949, 33525), (975, 32631), (1095, 29055), (1341, 23725), (1825, 17433), (1937, 16425), (2235, 14235), (2847, 11175), (2925, 10877), (3285, 9685), (3725, 8541), (4745, 6705), (5475, 5811)]