20640992

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2043

約数の個数: 48

約数和(自身を含む): 45314640

約数和(自身を除く): 24673648

約数列:

[1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 68, 76, 136, 152, 272, 304, 323, 544, 608, 646, 1292, 1997, 2584, 3994, 5168, 7988, 10336, 15976, 31952, 33949, 37943, 63904, 67898, 75886, 135796, 151772, 271592, 303544, 543184, 607088, 645031, 1086368, 1214176, 1290062, 2580124, 5160248, 10320496, 20640992]

約数ペア:

[(1, 20640992), (2, 10320496), (4, 5160248), (8, 2580124), (16, 1290062), (17, 1214176), (19, 1086368), (32, 645031), (34, 607088), (38, 543184), (68, 303544), (76, 271592), (136, 151772), (152, 135796), (272, 75886), (304, 67898), (323, 63904), (544, 37943), (608, 33949), (646, 31952), (1292, 15976), (1997, 10336), (2584, 7988), (3994, 5168)]