21172008

素因数分解:

$2^3\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:263

約数の個数: 128

約数和(自身を含む): 64512000

約数和(自身を除く): 43339992

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 13, 22, 24, 26, 31, 33, 39, 44, 52, 62, 66, 78, 88, 93, 104, 124, 132, 143, 156, 186, 199, 248, 264, 286, 312, 341, 372, 398, 403, 429, 572, 597, 682, 744, 796, 806, 858, 1023, 1144, 1194, 1209, 1364, 1592, 1612, 1716, 2046, 2189, 2388, 2418, 2587, 2728, 3224, 3432, 4092, 4378, 4433, 4776, 4836, 5174, 6169, 6567, 7761, 8184, 8756, 8866, 9672, 10348, 12338, 13134, 13299, 15522, 17512, 17732, 18507, 20696, 24676, 26268, 26598, 28457, 31044, 35464, 37014, 49352, 52536, 53196, 56914, 62088, 67859, 74028, 80197, 85371, 106392, 113828, 135718, 148056, 160394, 170742, 203577, 227656, 240591, 271436, 320788, 341484, 407154, 481182, 542872, 641576, 682968, 814308, 882167, 962364, 1628616, 1764334, 1924728, 2646501, 3528668, 5293002, 7057336, 10586004, 21172008]

約数ペア:

[(1, 21172008), (2, 10586004), (3, 7057336), (4, 5293002), (6, 3528668), (8, 2646501), (11, 1924728), (12, 1764334), (13, 1628616), (22, 962364), (24, 882167), (26, 814308), (31, 682968), (33, 641576), (39, 542872), (44, 481182), (52, 407154), (62, 341484), (66, 320788), (78, 271436), (88, 240591), (93, 227656), (104, 203577), (124, 170742), (132, 160394), (143, 148056), (156, 135718), (186, 113828), (199, 106392), (248, 85371), (264, 80197), (286, 74028), (312, 67859), (341, 62088), (372, 56914), (398, 53196), (403, 52536), (429, 49352), (572, 37014), (597, 35464), (682, 31044), (744, 28457), (796, 26598), (806, 26268), (858, 24676), (1023, 20696), (1144, 18507), (1194, 17732), (1209, 17512), (1364, 15522), (1592, 13299), (1612, 13134), (1716, 12338), (2046, 10348), (2189, 9672), (2388, 8866), (2418, 8756), (2587, 8184), (2728, 7761), (3224, 6567), (3432, 6169), (4092, 5174), (4378, 4836), (4433, 4776)]