20785500

素因数分解:

$2^2\times 3^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:205

約数の個数: 144

約数和(自身を含む): 68140800

約数和(自身を除く): 47355300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 31, 36, 45, 50, 60, 62, 75, 90, 93, 100, 124, 125, 149, 150, 155, 180, 186, 225, 250, 279, 298, 300, 310, 372, 375, 447, 450, 465, 500, 558, 596, 620, 745, 750, 775, 894, 900, 930, 1116, 1125, 1341, 1395, 1490, 1500, 1550, 1788, 1860, 2235, 2250, 2325, 2682, 2790, 2980, 3100, 3725, 3875, 4470, 4500, 4619, 4650, 5364, 5580, 6705, 6975, 7450, 7750, 8940, 9238, 9300, 11175, 11625, 13410, 13857, 13950, 14900, 15500, 18476, 18625, 22350, 23095, 23250, 26820, 27714, 27900, 33525, 34875, 37250, 41571, 44700, 46190, 46500, 55428, 55875, 67050, 69285, 69750, 74500, 83142, 92380, 111750, 115475, 134100, 138570, 139500, 166284, 167625, 207855, 223500, 230950, 277140, 335250, 346425, 415710, 461900, 577375, 670500, 692850, 831420, 1039275, 1154750, 1385700, 1732125, 2078550, 2309500, 3464250, 4157100, 5196375, 6928500, 10392750, 20785500]

約数ペア:

[(1, 20785500), (2, 10392750), (3, 6928500), (4, 5196375), (5, 4157100), (6, 3464250), (9, 2309500), (10, 2078550), (12, 1732125), (15, 1385700), (18, 1154750), (20, 1039275), (25, 831420), (30, 692850), (31, 670500), (36, 577375), (45, 461900), (50, 415710), (60, 346425), (62, 335250), (75, 277140), (90, 230950), (93, 223500), (100, 207855), (124, 167625), (125, 166284), (149, 139500), (150, 138570), (155, 134100), (180, 115475), (186, 111750), (225, 92380), (250, 83142), (279, 74500), (298, 69750), (300, 69285), (310, 67050), (372, 55875), (375, 55428), (447, 46500), (450, 46190), (465, 44700), (500, 41571), (558, 37250), (596, 34875), (620, 33525), (745, 27900), (750, 27714), (775, 26820), (894, 23250), (900, 23095), (930, 22350), (1116, 18625), (1125, 18476), (1341, 15500), (1395, 14900), (1490, 13950), (1500, 13857), (1550, 13410), (1788, 11625), (1860, 11175), (2235, 9300), (2250, 9238), (2325, 8940), (2682, 7750), (2790, 7450), (2980, 6975), (3100, 6705), (3725, 5580), (3875, 5364), (4470, 4650), (4500, 4619)]