20990648

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^2\times {\mathrm{1297}}^1$

素因数の和:1344

約数の個数: 48

約数和(自身を含む): 47818320

約数和(自身を除く): 26827672

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 56, 68, 119, 136, 238, 289, 476, 578, 952, 1156, 1297, 2023, 2312, 2594, 4046, 5188, 8092, 9079, 10376, 16184, 18158, 22049, 36316, 44098, 72632, 88196, 154343, 176392, 308686, 374833, 617372, 749666, 1234744, 1499332, 2623831, 2998664, 5247662, 10495324, 20990648]

約数ペア:

[(1, 20990648), (2, 10495324), (4, 5247662), (7, 2998664), (8, 2623831), (14, 1499332), (17, 1234744), (28, 749666), (34, 617372), (56, 374833), (68, 308686), (119, 176392), (136, 154343), (238, 88196), (289, 72632), (476, 44098), (578, 36316), (952, 22049), (1156, 18158), (1297, 16184), (2023, 10376), (2312, 9079), (2594, 8092), (4046, 5188)]