21985128

素因数分解:

$2^3\times 3^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{487}}^1$

素因数の和:532

約数の個数: 128

約数和(自身を含む): 70272000

約数和(自身を除く): 48286872

約数列:

[1, 2, 3, 4, 6, 8, 9, 11, 12, 18, 19, 22, 24, 27, 33, 36, 38, 44, 54, 57, 66, 72, 76, 88, 99, 108, 114, 132, 152, 171, 198, 209, 216, 228, 264, 297, 342, 396, 418, 456, 487, 513, 594, 627, 684, 792, 836, 974, 1026, 1188, 1254, 1368, 1461, 1672, 1881, 1948, 2052, 2376, 2508, 2922, 3762, 3896, 4104, 4383, 5016, 5357, 5643, 5844, 7524, 8766, 9253, 10714, 11286, 11688, 13149, 15048, 16071, 17532, 18506, 21428, 22572, 26298, 27759, 32142, 35064, 37012, 42856, 45144, 48213, 52596, 55518, 64284, 74024, 83277, 96426, 101783, 105192, 111036, 128568, 144639, 166554, 192852, 203566, 222072, 249831, 289278, 305349, 333108, 385704, 407132, 499662, 578556, 610698, 666216, 814264, 916047, 999324, 1157112, 1221396, 1832094, 1998648, 2442792, 2748141, 3664188, 5496282, 7328376, 10992564, 21985128]

約数ペア:

[(1, 21985128), (2, 10992564), (3, 7328376), (4, 5496282), (6, 3664188), (8, 2748141), (9, 2442792), (11, 1998648), (12, 1832094), (18, 1221396), (19, 1157112), (22, 999324), (24, 916047), (27, 814264), (33, 666216), (36, 610698), (38, 578556), (44, 499662), (54, 407132), (57, 385704), (66, 333108), (72, 305349), (76, 289278), (88, 249831), (99, 222072), (108, 203566), (114, 192852), (132, 166554), (152, 144639), (171, 128568), (198, 111036), (209, 105192), (216, 101783), (228, 96426), (264, 83277), (297, 74024), (342, 64284), (396, 55518), (418, 52596), (456, 48213), (487, 45144), (513, 42856), (594, 37012), (627, 35064), (684, 32142), (792, 27759), (836, 26298), (974, 22572), (1026, 21428), (1188, 18506), (1254, 17532), (1368, 16071), (1461, 15048), (1672, 13149), (1881, 11688), (1948, 11286), (2052, 10714), (2376, 9253), (2508, 8766), (2922, 7524), (3762, 5844), (3896, 5643), (4104, 5357), (4383, 5016)]