20625280

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:136

約数の個数: 128

約数和(自身を含む): 55349280

約数和(自身を除く): 34724000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 37, 40, 52, 64, 65, 67, 74, 80, 104, 128, 130, 134, 148, 160, 185, 208, 260, 268, 296, 320, 335, 370, 416, 481, 520, 536, 592, 640, 670, 740, 832, 871, 962, 1040, 1072, 1184, 1340, 1480, 1664, 1742, 1924, 2080, 2144, 2368, 2405, 2479, 2680, 2960, 3484, 3848, 4160, 4288, 4355, 4736, 4810, 4958, 5360, 5920, 6968, 7696, 8320, 8576, 8710, 9620, 9916, 10720, 11840, 12395, 13936, 15392, 17420, 19240, 19832, 21440, 23680, 24790, 27872, 30784, 32227, 34840, 38480, 39664, 42880, 49580, 55744, 61568, 64454, 69680, 76960, 79328, 99160, 111488, 128908, 139360, 153920, 158656, 161135, 198320, 257816, 278720, 307840, 317312, 322270, 396640, 515632, 557440, 644540, 793280, 1031264, 1289080, 1586560, 2062528, 2578160, 4125056, 5156320, 10312640, 20625280]

約数ペア:

[(1, 20625280), (2, 10312640), (4, 5156320), (5, 4125056), (8, 2578160), (10, 2062528), (13, 1586560), (16, 1289080), (20, 1031264), (26, 793280), (32, 644540), (37, 557440), (40, 515632), (52, 396640), (64, 322270), (65, 317312), (67, 307840), (74, 278720), (80, 257816), (104, 198320), (128, 161135), (130, 158656), (134, 153920), (148, 139360), (160, 128908), (185, 111488), (208, 99160), (260, 79328), (268, 76960), (296, 69680), (320, 64454), (335, 61568), (370, 55744), (416, 49580), (481, 42880), (520, 39664), (536, 38480), (592, 34840), (640, 32227), (670, 30784), (740, 27872), (832, 24790), (871, 23680), (962, 21440), (1040, 19832), (1072, 19240), (1184, 17420), (1340, 15392), (1480, 13936), (1664, 12395), (1742, 11840), (1924, 10720), (2080, 9916), (2144, 9620), (2368, 8710), (2405, 8576), (2479, 8320), (2680, 7696), (2960, 6968), (3484, 5920), (3848, 5360), (4160, 4958), (4288, 4810), (4355, 4736)]