31278520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{661}}^1$

素因数の和:705

約数の個数: 96

約数和(自身を含む): 87225120

約数和(自身を除く): 55946600

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 169, 182, 260, 280, 338, 364, 455, 520, 661, 676, 728, 845, 910, 1183, 1322, 1352, 1690, 1820, 2366, 2644, 3305, 3380, 3640, 4627, 4732, 5288, 5915, 6610, 6760, 8593, 9254, 9464, 11830, 13220, 17186, 18508, 23135, 23660, 26440, 34372, 37016, 42965, 46270, 47320, 60151, 68744, 85930, 92540, 111709, 120302, 171860, 185080, 223418, 240604, 300755, 343720, 446836, 481208, 558545, 601510, 781963, 893672, 1117090, 1203020, 1563926, 2234180, 2406040, 3127852, 3909815, 4468360, 6255704, 7819630, 15639260, 31278520]

約数ペア:

[(1, 31278520), (2, 15639260), (4, 7819630), (5, 6255704), (7, 4468360), (8, 3909815), (10, 3127852), (13, 2406040), (14, 2234180), (20, 1563926), (26, 1203020), (28, 1117090), (35, 893672), (40, 781963), (52, 601510), (56, 558545), (65, 481208), (70, 446836), (91, 343720), (104, 300755), (130, 240604), (140, 223418), (169, 185080), (182, 171860), (260, 120302), (280, 111709), (338, 92540), (364, 85930), (455, 68744), (520, 60151), (661, 47320), (676, 46270), (728, 42965), (845, 37016), (910, 34372), (1183, 26440), (1322, 23660), (1352, 23135), (1690, 18508), (1820, 17186), (2366, 13220), (2644, 11830), (3305, 9464), (3380, 9254), (3640, 8593), (4627, 6760), (4732, 6610), (5288, 5915)]