21195972

素因数分解:

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

素因数の和:119

約数の個数: 144

約数和(自身を含む): 66890880

約数和(自身を除く): 45694908

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 23, 27, 28, 36, 42, 46, 53, 54, 63, 69, 84, 92, 106, 108, 126, 138, 159, 161, 189, 207, 212, 252, 276, 318, 322, 371, 378, 414, 477, 483, 529, 621, 636, 644, 742, 756, 828, 954, 966, 1058, 1113, 1219, 1242, 1431, 1449, 1484, 1587, 1908, 1932, 2116, 2226, 2438, 2484, 2862, 2898, 3174, 3339, 3657, 3703, 4347, 4452, 4761, 4876, 5724, 5796, 6348, 6678, 7314, 7406, 8533, 8694, 9522, 10017, 10971, 11109, 13356, 14283, 14628, 14812, 17066, 17388, 19044, 20034, 21942, 22218, 25599, 28037, 28566, 32913, 33327, 34132, 40068, 43884, 44436, 51198, 56074, 57132, 65826, 66654, 76797, 84111, 99981, 102396, 112148, 131652, 133308, 153594, 168222, 196259, 199962, 230391, 252333, 307188, 336444, 392518, 399924, 460782, 504666, 588777, 756999, 785036, 921564, 1009332, 1177554, 1513998, 1766331, 2355108, 3027996, 3532662, 5298993, 7065324, 10597986, 21195972]

約数ペア:

[(1, 21195972), (2, 10597986), (3, 7065324), (4, 5298993), (6, 3532662), (7, 3027996), (9, 2355108), (12, 1766331), (14, 1513998), (18, 1177554), (21, 1009332), (23, 921564), (27, 785036), (28, 756999), (36, 588777), (42, 504666), (46, 460782), (53, 399924), (54, 392518), (63, 336444), (69, 307188), (84, 252333), (92, 230391), (106, 199962), (108, 196259), (126, 168222), (138, 153594), (159, 133308), (161, 131652), (189, 112148), (207, 102396), (212, 99981), (252, 84111), (276, 76797), (318, 66654), (322, 65826), (371, 57132), (378, 56074), (414, 51198), (477, 44436), (483, 43884), (529, 40068), (621, 34132), (636, 33327), (644, 32913), (742, 28566), (756, 28037), (828, 25599), (954, 22218), (966, 21942), (1058, 20034), (1113, 19044), (1219, 17388), (1242, 17066), (1431, 14812), (1449, 14628), (1484, 14283), (1587, 13356), (1908, 11109), (1932, 10971), (2116, 10017), (2226, 9522), (2438, 8694), (2484, 8533), (2862, 7406), (2898, 7314), (3174, 6678), (3339, 6348), (3657, 5796), (3703, 5724), (4347, 4876), (4452, 4761)]