21029820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:360

約数の個数: 144

約数和(自身を含む): 71705088

約数和(自身を除く): 50675268

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 28, 30, 35, 42, 46, 49, 60, 69, 70, 84, 92, 98, 105, 115, 138, 140, 147, 161, 196, 210, 230, 245, 276, 294, 311, 322, 345, 420, 460, 483, 490, 588, 622, 644, 690, 735, 805, 933, 966, 980, 1127, 1244, 1380, 1470, 1555, 1610, 1866, 1932, 2177, 2254, 2415, 2940, 3110, 3220, 3381, 3732, 4354, 4508, 4665, 4830, 5635, 6220, 6531, 6762, 7153, 8708, 9330, 9660, 10885, 11270, 13062, 13524, 14306, 15239, 16905, 18660, 21459, 21770, 22540, 26124, 28612, 30478, 32655, 33810, 35765, 42918, 43540, 45717, 50071, 60956, 65310, 67620, 71530, 76195, 85836, 91434, 100142, 107295, 130620, 143060, 150213, 152390, 182868, 200284, 214590, 228585, 250355, 300426, 304780, 350497, 429180, 457170, 500710, 600852, 700994, 751065, 914340, 1001420, 1051491, 1401988, 1502130, 1752485, 2102982, 3004260, 3504970, 4205964, 5257455, 7009940, 10514910, 21029820]

約数ペア:

[(1, 21029820), (2, 10514910), (3, 7009940), (4, 5257455), (5, 4205964), (6, 3504970), (7, 3004260), (10, 2102982), (12, 1752485), (14, 1502130), (15, 1401988), (20, 1051491), (21, 1001420), (23, 914340), (28, 751065), (30, 700994), (35, 600852), (42, 500710), (46, 457170), (49, 429180), (60, 350497), (69, 304780), (70, 300426), (84, 250355), (92, 228585), (98, 214590), (105, 200284), (115, 182868), (138, 152390), (140, 150213), (147, 143060), (161, 130620), (196, 107295), (210, 100142), (230, 91434), (245, 85836), (276, 76195), (294, 71530), (311, 67620), (322, 65310), (345, 60956), (420, 50071), (460, 45717), (483, 43540), (490, 42918), (588, 35765), (622, 33810), (644, 32655), (690, 30478), (735, 28612), (805, 26124), (933, 22540), (966, 21770), (980, 21459), (1127, 18660), (1244, 16905), (1380, 15239), (1470, 14306), (1555, 13524), (1610, 13062), (1866, 11270), (1932, 10885), (2177, 9660), (2254, 9330), (2415, 8708), (2940, 7153), (3110, 6762), (3220, 6531), (3381, 6220), (3732, 5635), (4354, 4830), (4508, 4665)]