21068720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:282

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 31427920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 83, 95, 152, 166, 167, 190, 304, 332, 334, 380, 415, 664, 668, 760, 830, 835, 1328, 1336, 1520, 1577, 1660, 1670, 2672, 3154, 3173, 3320, 3340, 6308, 6346, 6640, 6680, 7885, 12616, 12692, 13360, 13861, 15770, 15865, 25232, 25384, 27722, 31540, 31730, 50768, 55444, 63080, 63460, 69305, 110888, 126160, 126920, 138610, 221776, 253840, 263359, 277220, 526718, 554440, 1053436, 1108880, 1316795, 2106872, 2633590, 4213744, 5267180, 10534360, 21068720]

約数ペア:

[(1, 21068720), (2, 10534360), (4, 5267180), (5, 4213744), (8, 2633590), (10, 2106872), (16, 1316795), (19, 1108880), (20, 1053436), (38, 554440), (40, 526718), (76, 277220), (80, 263359), (83, 253840), (95, 221776), (152, 138610), (166, 126920), (167, 126160), (190, 110888), (304, 69305), (332, 63460), (334, 63080), (380, 55444), (415, 50768), (664, 31730), (668, 31540), (760, 27722), (830, 25384), (835, 25232), (1328, 15865), (1336, 15770), (1520, 13861), (1577, 13360), (1660, 12692), (1670, 12616), (2672, 7885), (3154, 6680), (3173, 6640), (3320, 6346), (3340, 6308)]