20809880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5717}}^1$

素因数の和:5748

約数の個数: 64

約数和(自身を含む): 57637440

約数和(自身を除く): 36827560

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5717, 11434, 22868, 28585, 40019, 45736, 57170, 74321, 80038, 114340, 148642, 160076, 200095, 228680, 297284, 320152, 371605, 400190, 520247, 594568, 743210, 800380, 1040494, 1486420, 1600760, 2080988, 2601235, 2972840, 4161976, 5202470, 10404940, 20809880]

約数ペア:

[(1, 20809880), (2, 10404940), (4, 5202470), (5, 4161976), (7, 2972840), (8, 2601235), (10, 2080988), (13, 1600760), (14, 1486420), (20, 1040494), (26, 800380), (28, 743210), (35, 594568), (40, 520247), (52, 400190), (56, 371605), (65, 320152), (70, 297284), (91, 228680), (104, 200095), (130, 160076), (140, 148642), (182, 114340), (260, 80038), (280, 74321), (364, 57170), (455, 45736), (520, 40019), (728, 28585), (910, 22868), (1820, 11434), (3640, 5717)]