20675340

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:352

約数の個数: 144

約数和(自身を含む): 73120320

約数和(自身を除く): 52444980

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 61, 63, 70, 84, 90, 105, 122, 126, 140, 180, 183, 210, 244, 252, 269, 305, 315, 366, 420, 427, 538, 549, 610, 630, 732, 807, 854, 915, 1076, 1098, 1220, 1260, 1281, 1345, 1614, 1708, 1830, 1883, 2135, 2196, 2421, 2562, 2690, 2745, 3228, 3660, 3766, 3843, 4035, 4270, 4842, 5124, 5380, 5490, 5649, 6405, 7532, 7686, 8070, 8540, 9415, 9684, 10980, 11298, 12105, 12810, 15372, 16140, 16409, 16947, 18830, 19215, 22596, 24210, 25620, 28245, 32818, 33894, 37660, 38430, 48420, 49227, 56490, 65636, 67788, 76860, 82045, 84735, 98454, 112980, 114863, 147681, 164090, 169470, 196908, 229726, 246135, 295362, 328180, 338940, 344589, 459452, 492270, 574315, 590724, 689178, 738405, 984540, 1033767, 1148630, 1378356, 1476810, 1722945, 2067534, 2297260, 2953620, 3445890, 4135068, 5168835, 6891780, 10337670, 20675340]

約数ペア:

[(1, 20675340), (2, 10337670), (3, 6891780), (4, 5168835), (5, 4135068), (6, 3445890), (7, 2953620), (9, 2297260), (10, 2067534), (12, 1722945), (14, 1476810), (15, 1378356), (18, 1148630), (20, 1033767), (21, 984540), (28, 738405), (30, 689178), (35, 590724), (36, 574315), (42, 492270), (45, 459452), (60, 344589), (61, 338940), (63, 328180), (70, 295362), (84, 246135), (90, 229726), (105, 196908), (122, 169470), (126, 164090), (140, 147681), (180, 114863), (183, 112980), (210, 98454), (244, 84735), (252, 82045), (269, 76860), (305, 67788), (315, 65636), (366, 56490), (420, 49227), (427, 48420), (538, 38430), (549, 37660), (610, 33894), (630, 32818), (732, 28245), (807, 25620), (854, 24210), (915, 22596), (1076, 19215), (1098, 18830), (1220, 16947), (1260, 16409), (1281, 16140), (1345, 15372), (1614, 12810), (1708, 12105), (1830, 11298), (1883, 10980), (2135, 9684), (2196, 9415), (2421, 8540), (2562, 8070), (2690, 7686), (2745, 7532), (3228, 6405), (3660, 5649), (3766, 5490), (3843, 5380), (4035, 5124), (4270, 4842)]