20399850

素因数分解:

$2^1\times 3^5\times 5^2\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:123

約数の個数: 144

約数和(自身を含む): 60121152

約数和(自身を除く): 39721302

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 25, 27, 30, 45, 46, 50, 54, 69, 73, 75, 81, 90, 115, 135, 138, 146, 150, 162, 207, 219, 225, 230, 243, 270, 345, 365, 405, 414, 438, 450, 486, 575, 621, 657, 675, 690, 730, 810, 1035, 1095, 1150, 1215, 1242, 1314, 1350, 1679, 1725, 1825, 1863, 1971, 2025, 2070, 2190, 2430, 3105, 3285, 3358, 3450, 3650, 3726, 3942, 4050, 5037, 5175, 5475, 5589, 5913, 6075, 6210, 6570, 8395, 9315, 9855, 10074, 10350, 10950, 11178, 11826, 12150, 15111, 15525, 16425, 16790, 17739, 18630, 19710, 25185, 27945, 29565, 30222, 31050, 32850, 35478, 41975, 45333, 46575, 49275, 50370, 55890, 59130, 75555, 83950, 88695, 90666, 93150, 98550, 125925, 135999, 139725, 147825, 151110, 177390, 226665, 251850, 271998, 279450, 295650, 377775, 407997, 443475, 453330, 679995, 755550, 815994, 886950, 1133325, 1359990, 2039985, 2266650, 3399975, 4079970, 6799950, 10199925, 20399850]

約数ペア:

[(1, 20399850), (2, 10199925), (3, 6799950), (5, 4079970), (6, 3399975), (9, 2266650), (10, 2039985), (15, 1359990), (18, 1133325), (23, 886950), (25, 815994), (27, 755550), (30, 679995), (45, 453330), (46, 443475), (50, 407997), (54, 377775), (69, 295650), (73, 279450), (75, 271998), (81, 251850), (90, 226665), (115, 177390), (135, 151110), (138, 147825), (146, 139725), (150, 135999), (162, 125925), (207, 98550), (219, 93150), (225, 90666), (230, 88695), (243, 83950), (270, 75555), (345, 59130), (365, 55890), (405, 50370), (414, 49275), (438, 46575), (450, 45333), (486, 41975), (575, 35478), (621, 32850), (657, 31050), (675, 30222), (690, 29565), (730, 27945), (810, 25185), (1035, 19710), (1095, 18630), (1150, 17739), (1215, 16790), (1242, 16425), (1314, 15525), (1350, 15111), (1679, 12150), (1725, 11826), (1825, 11178), (1863, 10950), (1971, 10350), (2025, 10074), (2070, 9855), (2190, 9315), (2430, 8395), (3105, 6570), (3285, 6210), (3358, 6075), (3450, 5913), (3650, 5589), (3726, 5475), (3942, 5175), (4050, 5037)]