21042378

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:228

約数の個数: 96

約数和(自身を含む): 55800576

約数和(自身を除く): 34758198

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 23, 42, 46, 53, 63, 69, 106, 126, 137, 138, 159, 161, 207, 274, 318, 322, 371, 411, 414, 477, 483, 742, 822, 954, 959, 966, 1113, 1219, 1233, 1449, 1918, 2226, 2438, 2466, 2877, 2898, 3151, 3339, 3657, 5754, 6302, 6678, 7261, 7314, 8533, 8631, 9453, 10971, 14522, 17066, 17262, 18906, 21783, 21942, 22057, 25599, 28359, 43566, 44114, 50827, 51198, 56718, 65349, 66171, 76797, 101654, 130698, 132342, 152481, 153594, 167003, 198513, 304962, 334006, 397026, 457443, 501009, 914886, 1002018, 1169021, 1503027, 2338042, 3006054, 3507063, 7014126, 10521189, 21042378]

約数ペア:

[(1, 21042378), (2, 10521189), (3, 7014126), (6, 3507063), (7, 3006054), (9, 2338042), (14, 1503027), (18, 1169021), (21, 1002018), (23, 914886), (42, 501009), (46, 457443), (53, 397026), (63, 334006), (69, 304962), (106, 198513), (126, 167003), (137, 153594), (138, 152481), (159, 132342), (161, 130698), (207, 101654), (274, 76797), (318, 66171), (322, 65349), (371, 56718), (411, 51198), (414, 50827), (477, 44114), (483, 43566), (742, 28359), (822, 25599), (954, 22057), (959, 21942), (966, 21783), (1113, 18906), (1219, 17262), (1233, 17066), (1449, 14522), (1918, 10971), (2226, 9453), (2438, 8631), (2466, 8533), (2877, 7314), (2898, 7261), (3151, 6678), (3339, 6302), (3657, 5754)]