18020925

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 35680008

約数和(自身を除く): 17659083

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 61, 65, 75, 101, 117, 183, 195, 225, 303, 305, 325, 505, 549, 585, 793, 909, 915, 975, 1313, 1515, 1525, 2379, 2525, 2745, 2925, 3939, 3965, 4545, 4575, 6161, 6565, 7137, 7575, 11817, 11895, 13725, 18483, 19695, 19825, 22725, 30805, 32825, 35685, 55449, 59085, 59475, 80093, 92415, 98475, 154025, 178425, 240279, 277245, 295425, 400465, 462075, 720837, 1201395, 1386225, 2002325, 3604185, 6006975, 18020925]

約数ペア:

[(1, 18020925), (3, 6006975), (5, 3604185), (9, 2002325), (13, 1386225), (15, 1201395), (25, 720837), (39, 462075), (45, 400465), (61, 295425), (65, 277245), (75, 240279), (101, 178425), (117, 154025), (183, 98475), (195, 92415), (225, 80093), (303, 59475), (305, 59085), (325, 55449), (505, 35685), (549, 32825), (585, 30805), (793, 22725), (909, 19825), (915, 19695), (975, 18483), (1313, 13725), (1515, 11895), (1525, 11817), (2379, 7575), (2525, 7137), (2745, 6565), (2925, 6161), (3939, 4575), (3965, 4545)]