21321040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:141

約数の個数: 120

約数和(自身を含む): 57183840

約数和(自身を除く): 35862800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 83, 95, 104, 130, 152, 166, 169, 190, 208, 247, 260, 304, 332, 338, 380, 415, 494, 520, 664, 676, 760, 830, 845, 988, 1040, 1079, 1235, 1328, 1352, 1520, 1577, 1660, 1690, 1976, 2158, 2470, 2704, 3154, 3211, 3320, 3380, 3952, 4316, 4940, 5395, 6308, 6422, 6640, 6760, 7885, 8632, 9880, 10790, 12616, 12844, 13520, 14027, 15770, 16055, 17264, 19760, 20501, 21580, 25232, 25688, 28054, 31540, 32110, 41002, 43160, 51376, 56108, 63080, 64220, 70135, 82004, 86320, 102505, 112216, 126160, 128440, 140270, 164008, 205010, 224432, 256880, 266513, 280540, 328016, 410020, 533026, 561080, 820040, 1066052, 1122160, 1332565, 1640080, 2132104, 2665130, 4264208, 5330260, 10660520, 21321040]

約数ペア:

[(1, 21321040), (2, 10660520), (4, 5330260), (5, 4264208), (8, 2665130), (10, 2132104), (13, 1640080), (16, 1332565), (19, 1122160), (20, 1066052), (26, 820040), (38, 561080), (40, 533026), (52, 410020), (65, 328016), (76, 280540), (80, 266513), (83, 256880), (95, 224432), (104, 205010), (130, 164008), (152, 140270), (166, 128440), (169, 126160), (190, 112216), (208, 102505), (247, 86320), (260, 82004), (304, 70135), (332, 64220), (338, 63080), (380, 56108), (415, 51376), (494, 43160), (520, 41002), (664, 32110), (676, 31540), (760, 28054), (830, 25688), (845, 25232), (988, 21580), (1040, 20501), (1079, 19760), (1235, 17264), (1328, 16055), (1352, 15770), (1520, 14027), (1577, 13520), (1660, 12844), (1690, 12616), (1976, 10790), (2158, 9880), (2470, 8632), (2704, 7885), (3154, 6760), (3211, 6640), (3320, 6422), (3380, 6308), (3952, 5395), (4316, 4940)]