21742728

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{331}}^1$

素因数の和:387

約数の個数: 128

約数和(自身を含む): 68843520

約数和(自身を除く): 47100792

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 17, 21, 23, 24, 28, 34, 42, 46, 51, 56, 68, 69, 84, 92, 102, 119, 136, 138, 161, 168, 184, 204, 238, 276, 322, 331, 357, 391, 408, 476, 483, 552, 644, 662, 714, 782, 952, 966, 993, 1173, 1288, 1324, 1428, 1564, 1932, 1986, 2317, 2346, 2648, 2737, 2856, 3128, 3864, 3972, 4634, 4692, 5474, 5627, 6951, 7613, 7944, 8211, 9268, 9384, 10948, 11254, 13902, 15226, 16422, 16881, 18536, 21896, 22508, 22839, 27804, 30452, 32844, 33762, 39389, 45016, 45678, 53291, 55608, 60904, 65688, 67524, 78778, 91356, 106582, 118167, 129421, 135048, 157556, 159873, 182712, 213164, 236334, 258842, 315112, 319746, 388263, 426328, 472668, 517684, 639492, 776526, 905947, 945336, 1035368, 1278984, 1553052, 1811894, 2717841, 3106104, 3623788, 5435682, 7247576, 10871364, 21742728]

約数ペア:

[(1, 21742728), (2, 10871364), (3, 7247576), (4, 5435682), (6, 3623788), (7, 3106104), (8, 2717841), (12, 1811894), (14, 1553052), (17, 1278984), (21, 1035368), (23, 945336), (24, 905947), (28, 776526), (34, 639492), (42, 517684), (46, 472668), (51, 426328), (56, 388263), (68, 319746), (69, 315112), (84, 258842), (92, 236334), (102, 213164), (119, 182712), (136, 159873), (138, 157556), (161, 135048), (168, 129421), (184, 118167), (204, 106582), (238, 91356), (276, 78778), (322, 67524), (331, 65688), (357, 60904), (391, 55608), (408, 53291), (476, 45678), (483, 45016), (552, 39389), (644, 33762), (662, 32844), (714, 30452), (782, 27804), (952, 22839), (966, 22508), (993, 21896), (1173, 18536), (1288, 16881), (1324, 16422), (1428, 15226), (1564, 13902), (1932, 11254), (1986, 10948), (2317, 9384), (2346, 9268), (2648, 8211), (2737, 7944), (2856, 7613), (3128, 6951), (3864, 5627), (3972, 5474), (4634, 4692)]