20809920

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:482

約数の個数: 112

約数和(自身を含む): 67482720

約数和(自身を除く): 46672800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 53, 60, 64, 80, 96, 106, 120, 159, 160, 192, 212, 240, 265, 318, 320, 409, 424, 480, 530, 636, 795, 818, 848, 960, 1060, 1227, 1272, 1590, 1636, 1696, 2045, 2120, 2454, 2544, 3180, 3272, 3392, 4090, 4240, 4908, 5088, 6135, 6360, 6544, 8180, 8480, 9816, 10176, 12270, 12720, 13088, 16360, 16960, 19632, 21677, 24540, 25440, 26176, 32720, 39264, 43354, 49080, 50880, 65031, 65440, 78528, 86708, 98160, 108385, 130062, 130880, 173416, 196320, 216770, 260124, 325155, 346832, 392640, 433540, 520248, 650310, 693664, 867080, 1040496, 1300620, 1387328, 1734160, 2080992, 2601240, 3468320, 4161984, 5202480, 6936640, 10404960, 20809920]

約数ペア:

[(1, 20809920), (2, 10404960), (3, 6936640), (4, 5202480), (5, 4161984), (6, 3468320), (8, 2601240), (10, 2080992), (12, 1734160), (15, 1387328), (16, 1300620), (20, 1040496), (24, 867080), (30, 693664), (32, 650310), (40, 520248), (48, 433540), (53, 392640), (60, 346832), (64, 325155), (80, 260124), (96, 216770), (106, 196320), (120, 173416), (159, 130880), (160, 130062), (192, 108385), (212, 98160), (240, 86708), (265, 78528), (318, 65440), (320, 65031), (409, 50880), (424, 49080), (480, 43354), (530, 39264), (636, 32720), (795, 26176), (818, 25440), (848, 24540), (960, 21677), (1060, 19632), (1227, 16960), (1272, 16360), (1590, 13088), (1636, 12720), (1696, 12270), (2045, 10176), (2120, 9816), (2454, 8480), (2544, 8180), (3180, 6544), (3272, 6360), (3392, 6135), (4090, 5088), (4240, 4908)]