21318720

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{419}}^1$

素因数の和:492

約数の個数: 112

約数和(自身を含む): 69128640

約数和(自身を除く): 47809920

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, 419, 424, 480, 530, 636, 795, 838, 848, 960, 1060, 1257, 1272, 1590, 1676, 1696, 2095, 2120, 2514, 2544, 3180, 3352, 3392, 4190, 4240, 5028, 5088, 6285, 6360, 6704, 8380, 8480, 10056, 10176, 12570, 12720, 13408, 16760, 16960, 20112, 22207, 25140, 25440, 26816, 33520, 40224, 44414, 50280, 50880, 66621, 67040, 80448, 88828, 100560, 111035, 133242, 134080, 177656, 201120, 222070, 266484, 333105, 355312, 402240, 444140, 532968, 666210, 710624, 888280, 1065936, 1332420, 1421248, 1776560, 2131872, 2664840, 3553120, 4263744, 5329680, 7106240, 10659360, 21318720]

約数ペア:

[(1, 21318720), (2, 10659360), (3, 7106240), (4, 5329680), (5, 4263744), (6, 3553120), (8, 2664840), (10, 2131872), (12, 1776560), (15, 1421248), (16, 1332420), (20, 1065936), (24, 888280), (30, 710624), (32, 666210), (40, 532968), (48, 444140), (53, 402240), (60, 355312), (64, 333105), (80, 266484), (96, 222070), (106, 201120), (120, 177656), (159, 134080), (160, 133242), (192, 111035), (212, 100560), (240, 88828), (265, 80448), (318, 67040), (320, 66621), (419, 50880), (424, 50280), (480, 44414), (530, 40224), (636, 33520), (795, 26816), (838, 25440), (848, 25140), (960, 22207), (1060, 20112), (1257, 16960), (1272, 16760), (1590, 13408), (1676, 12720), (1696, 12570), (2095, 10176), (2120, 10056), (2514, 8480), (2544, 8380), (3180, 6704), (3352, 6360), (3392, 6285), (4190, 5088), (4240, 5028)]