21260820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{227}}^1$

素因数の和:469

約数の個数: 96

約数和(自身を含む): 68640768

約数和(自身を除く): 47379948

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 223, 227, 420, 446, 454, 669, 681, 892, 908, 1115, 1135, 1338, 1362, 1561, 1589, 2230, 2270, 2676, 2724, 3122, 3178, 3345, 3405, 4460, 4540, 4683, 4767, 6244, 6356, 6690, 6810, 7805, 7945, 9366, 9534, 13380, 13620, 15610, 15890, 18732, 19068, 23415, 23835, 31220, 31780, 46830, 47670, 50621, 93660, 95340, 101242, 151863, 202484, 253105, 303726, 354347, 506210, 607452, 708694, 759315, 1012420, 1063041, 1417388, 1518630, 1771735, 2126082, 3037260, 3543470, 4252164, 5315205, 7086940, 10630410, 21260820]

約数ペア:

[(1, 21260820), (2, 10630410), (3, 7086940), (4, 5315205), (5, 4252164), (6, 3543470), (7, 3037260), (10, 2126082), (12, 1771735), (14, 1518630), (15, 1417388), (20, 1063041), (21, 1012420), (28, 759315), (30, 708694), (35, 607452), (42, 506210), (60, 354347), (70, 303726), (84, 253105), (105, 202484), (140, 151863), (210, 101242), (223, 95340), (227, 93660), (420, 50621), (446, 47670), (454, 46830), (669, 31780), (681, 31220), (892, 23835), (908, 23415), (1115, 19068), (1135, 18732), (1338, 15890), (1362, 15610), (1561, 13620), (1589, 13380), (2230, 9534), (2270, 9366), (2676, 7945), (2724, 7805), (3122, 6810), (3178, 6690), (3345, 6356), (3405, 6244), (4460, 4767), (4540, 4683)]