21406008

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:221

約数の個数: 128

約数和(自身を含む): 63705600

約数和(自身を除く): 42299592

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 19, 23, 24, 26, 38, 39, 46, 52, 57, 69, 76, 78, 92, 104, 114, 138, 152, 156, 157, 184, 228, 247, 276, 299, 312, 314, 437, 456, 471, 494, 552, 598, 628, 741, 874, 897, 942, 988, 1196, 1256, 1311, 1482, 1748, 1794, 1884, 1976, 2041, 2392, 2622, 2964, 2983, 3496, 3588, 3611, 3768, 4082, 5244, 5681, 5928, 5966, 6123, 7176, 7222, 8164, 8949, 10488, 10833, 11362, 11932, 12246, 14444, 16328, 17043, 17898, 21666, 22724, 23864, 24492, 28888, 34086, 35796, 38779, 43332, 45448, 46943, 48984, 68172, 68609, 71592, 77558, 86664, 93886, 116337, 136344, 137218, 140829, 155116, 187772, 205827, 232674, 274436, 281658, 310232, 375544, 411654, 465348, 548872, 563316, 823308, 891917, 930696, 1126632, 1646616, 1783834, 2675751, 3567668, 5351502, 7135336, 10703004, 21406008]

約数ペア:

[(1, 21406008), (2, 10703004), (3, 7135336), (4, 5351502), (6, 3567668), (8, 2675751), (12, 1783834), (13, 1646616), (19, 1126632), (23, 930696), (24, 891917), (26, 823308), (38, 563316), (39, 548872), (46, 465348), (52, 411654), (57, 375544), (69, 310232), (76, 281658), (78, 274436), (92, 232674), (104, 205827), (114, 187772), (138, 155116), (152, 140829), (156, 137218), (157, 136344), (184, 116337), (228, 93886), (247, 86664), (276, 77558), (299, 71592), (312, 68609), (314, 68172), (437, 48984), (456, 46943), (471, 45448), (494, 43332), (552, 38779), (598, 35796), (628, 34086), (741, 28888), (874, 24492), (897, 23864), (942, 22724), (988, 21666), (1196, 17898), (1256, 17043), (1311, 16328), (1482, 14444), (1748, 12246), (1794, 11932), (1884, 11362), (1976, 10833), (2041, 10488), (2392, 8949), (2622, 8164), (2964, 7222), (2983, 7176), (3496, 6123), (3588, 5966), (3611, 5928), (3768, 5681), (4082, 5244)]