21006440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:259

約数の個数: 128

約数和(自身を含む): 60480000

約数和(自身を除く): 39473560

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 29, 35, 40, 52, 56, 58, 65, 70, 91, 104, 116, 130, 140, 145, 182, 199, 203, 232, 260, 280, 290, 364, 377, 398, 406, 455, 520, 580, 728, 754, 796, 812, 910, 995, 1015, 1160, 1393, 1508, 1592, 1624, 1820, 1885, 1990, 2030, 2587, 2639, 2786, 3016, 3640, 3770, 3980, 4060, 5174, 5278, 5572, 5771, 6965, 7540, 7960, 8120, 10348, 10556, 11144, 11542, 12935, 13195, 13930, 15080, 18109, 20696, 21112, 23084, 25870, 26390, 27860, 28855, 36218, 40397, 46168, 51740, 52780, 55720, 57710, 72436, 75023, 80794, 90545, 103480, 105560, 115420, 144872, 150046, 161588, 181090, 201985, 230840, 300092, 323176, 362180, 375115, 403970, 525161, 600184, 724360, 750230, 807940, 1050322, 1500460, 1615880, 2100644, 2625805, 3000920, 4201288, 5251610, 10503220, 21006440]

約数ペア:

[(1, 21006440), (2, 10503220), (4, 5251610), (5, 4201288), (7, 3000920), (8, 2625805), (10, 2100644), (13, 1615880), (14, 1500460), (20, 1050322), (26, 807940), (28, 750230), (29, 724360), (35, 600184), (40, 525161), (52, 403970), (56, 375115), (58, 362180), (65, 323176), (70, 300092), (91, 230840), (104, 201985), (116, 181090), (130, 161588), (140, 150046), (145, 144872), (182, 115420), (199, 105560), (203, 103480), (232, 90545), (260, 80794), (280, 75023), (290, 72436), (364, 57710), (377, 55720), (398, 52780), (406, 51740), (455, 46168), (520, 40397), (580, 36218), (728, 28855), (754, 27860), (796, 26390), (812, 25870), (910, 23084), (995, 21112), (1015, 20696), (1160, 18109), (1393, 15080), (1508, 13930), (1592, 13195), (1624, 12935), (1820, 11542), (1885, 11144), (1990, 10556), (2030, 10348), (2587, 8120), (2639, 7960), (2786, 7540), (3016, 6965), (3640, 5771), (3770, 5572), (3980, 5278), (4060, 5174)]