28009720

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{7219}}^1$

素因数の和:7327

約数の個数: 32

約数和(自身を含む): 63680400

約数和(自身を除く): 35670680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 7219, 14438, 28876, 36095, 57752, 72190, 144380, 288760, 700243, 1400486, 2800972, 3501215, 5601944, 7002430, 14004860, 28009720]

約数ペア:

[(1, 28009720), (2, 14004860), (4, 7002430), (5, 5601944), (8, 3501215), (10, 2800972), (20, 1400486), (40, 700243), (97, 288760), (194, 144380), (388, 72190), (485, 57752), (776, 36095), (970, 28876), (1940, 14438), (3880, 7219)]