21394880

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:206

約数の個数: 112

約数和(自身を含む): 56753760

約数和(自身を除く): 35358880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 37, 40, 52, 64, 65, 74, 80, 104, 130, 139, 148, 160, 185, 208, 260, 278, 296, 320, 370, 416, 481, 520, 556, 592, 695, 740, 832, 962, 1040, 1112, 1184, 1390, 1480, 1807, 1924, 2080, 2224, 2368, 2405, 2780, 2960, 3614, 3848, 4160, 4448, 4810, 5143, 5560, 5920, 7228, 7696, 8896, 9035, 9620, 10286, 11120, 11840, 14456, 15392, 18070, 19240, 20572, 22240, 25715, 28912, 30784, 36140, 38480, 41144, 44480, 51430, 57824, 66859, 72280, 76960, 82288, 102860, 115648, 133718, 144560, 153920, 164576, 205720, 267436, 289120, 329152, 334295, 411440, 534872, 578240, 668590, 822880, 1069744, 1337180, 1645760, 2139488, 2674360, 4278976, 5348720, 10697440, 21394880]

約数ペア:

[(1, 21394880), (2, 10697440), (4, 5348720), (5, 4278976), (8, 2674360), (10, 2139488), (13, 1645760), (16, 1337180), (20, 1069744), (26, 822880), (32, 668590), (37, 578240), (40, 534872), (52, 411440), (64, 334295), (65, 329152), (74, 289120), (80, 267436), (104, 205720), (130, 164576), (139, 153920), (148, 144560), (160, 133718), (185, 115648), (208, 102860), (260, 82288), (278, 76960), (296, 72280), (320, 66859), (370, 57824), (416, 51430), (481, 44480), (520, 41144), (556, 38480), (592, 36140), (695, 30784), (740, 28912), (832, 25715), (962, 22240), (1040, 20572), (1112, 19240), (1184, 18070), (1390, 15392), (1480, 14456), (1807, 11840), (1924, 11120), (2080, 10286), (2224, 9620), (2368, 9035), (2405, 8896), (2780, 7696), (2960, 7228), (3614, 5920), (3848, 5560), (4160, 5143), (4448, 4810)]