21791520

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{409}}^1$

素因数の和:467

約数の個数: 144

約数和(自身を含む): 76560120

約数和(自身を除く): 54768600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 37, 40, 45, 48, 60, 72, 74, 80, 90, 96, 111, 120, 144, 148, 160, 180, 185, 222, 240, 288, 296, 333, 360, 370, 409, 444, 480, 555, 592, 666, 720, 740, 818, 888, 1110, 1184, 1227, 1332, 1440, 1480, 1636, 1665, 1776, 2045, 2220, 2454, 2664, 2960, 3272, 3330, 3552, 3681, 4090, 4440, 4908, 5328, 5920, 6135, 6544, 6660, 7362, 8180, 8880, 9816, 10656, 12270, 13088, 13320, 14724, 15133, 16360, 17760, 18405, 19632, 24540, 26640, 29448, 30266, 32720, 36810, 39264, 45399, 49080, 53280, 58896, 60532, 65440, 73620, 75665, 90798, 98160, 117792, 121064, 136197, 147240, 151330, 181596, 196320, 226995, 242128, 272394, 294480, 302660, 363192, 453990, 484256, 544788, 588960, 605320, 680985, 726384, 907980, 1089576, 1210640, 1361970, 1452768, 1815960, 2179152, 2421280, 2723940, 3631920, 4358304, 5447880, 7263840, 10895760, 21791520]

約数ペア:

[(1, 21791520), (2, 10895760), (3, 7263840), (4, 5447880), (5, 4358304), (6, 3631920), (8, 2723940), (9, 2421280), (10, 2179152), (12, 1815960), (15, 1452768), (16, 1361970), (18, 1210640), (20, 1089576), (24, 907980), (30, 726384), (32, 680985), (36, 605320), (37, 588960), (40, 544788), (45, 484256), (48, 453990), (60, 363192), (72, 302660), (74, 294480), (80, 272394), (90, 242128), (96, 226995), (111, 196320), (120, 181596), (144, 151330), (148, 147240), (160, 136197), (180, 121064), (185, 117792), (222, 98160), (240, 90798), (288, 75665), (296, 73620), (333, 65440), (360, 60532), (370, 58896), (409, 53280), (444, 49080), (480, 45399), (555, 39264), (592, 36810), (666, 32720), (720, 30266), (740, 29448), (818, 26640), (888, 24540), (1110, 19632), (1184, 18405), (1227, 17760), (1332, 16360), (1440, 15133), (1480, 14724), (1636, 13320), (1665, 13088), (1776, 12270), (2045, 10656), (2220, 9816), (2454, 8880), (2664, 8180), (2960, 7362), (3272, 6660), (3330, 6544), (3552, 6135), (3681, 5920), (4090, 5328), (4440, 4908)]