21507990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:174

約数の個数: 128

約数和(自身を含む): 63424512

約数和(自身を除く): 41916522

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 23, 30, 35, 42, 46, 61, 69, 70, 73, 105, 115, 122, 138, 146, 161, 183, 210, 219, 230, 305, 322, 345, 365, 366, 427, 438, 483, 511, 610, 690, 730, 805, 854, 915, 966, 1022, 1095, 1281, 1403, 1533, 1610, 1679, 1830, 2135, 2190, 2415, 2555, 2562, 2806, 3066, 3358, 4209, 4270, 4453, 4830, 5037, 5110, 6405, 7015, 7665, 8395, 8418, 8906, 9821, 10074, 11753, 12810, 13359, 14030, 15330, 16790, 19642, 21045, 22265, 23506, 25185, 26718, 29463, 31171, 35259, 42090, 44530, 49105, 50370, 58765, 58926, 62342, 66795, 70518, 93513, 98210, 102419, 117530, 133590, 147315, 155855, 176295, 187026, 204838, 294630, 307257, 311710, 352590, 467565, 512095, 614514, 716933, 935130, 1024190, 1433866, 1536285, 2150799, 3072570, 3584665, 4301598, 7169330, 10753995, 21507990]

約数ペア:

[(1, 21507990), (2, 10753995), (3, 7169330), (5, 4301598), (6, 3584665), (7, 3072570), (10, 2150799), (14, 1536285), (15, 1433866), (21, 1024190), (23, 935130), (30, 716933), (35, 614514), (42, 512095), (46, 467565), (61, 352590), (69, 311710), (70, 307257), (73, 294630), (105, 204838), (115, 187026), (122, 176295), (138, 155855), (146, 147315), (161, 133590), (183, 117530), (210, 102419), (219, 98210), (230, 93513), (305, 70518), (322, 66795), (345, 62342), (365, 58926), (366, 58765), (427, 50370), (438, 49105), (483, 44530), (511, 42090), (610, 35259), (690, 31171), (730, 29463), (805, 26718), (854, 25185), (915, 23506), (966, 22265), (1022, 21045), (1095, 19642), (1281, 16790), (1403, 15330), (1533, 14030), (1610, 13359), (1679, 12810), (1830, 11753), (2135, 10074), (2190, 9821), (2415, 8906), (2555, 8418), (2562, 8395), (2806, 7665), (3066, 7015), (3358, 6405), (4209, 5110), (4270, 5037), (4453, 4830)]