99100000

素因数分解:

$2^5\times 5^5\times {\mathrm{991}}^1$

素因数の和:1026

約数の個数: 72

約数和(自身を含む): 244109376

約数和(自身を除く): 145009376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 991, 1000, 1250, 1982, 2000, 2500, 3125, 3964, 4000, 4955, 5000, 6250, 7928, 9910, 10000, 12500, 15856, 19820, 20000, 24775, 25000, 31712, 39640, 49550, 50000, 79280, 99100, 100000, 123875, 158560, 198200, 247750, 396400, 495500, 619375, 792800, 991000, 1238750, 1982000, 2477500, 3096875, 3964000, 4955000, 6193750, 9910000, 12387500, 19820000, 24775000, 49550000, 99100000]

約数ペア:

[(1, 99100000), (2, 49550000), (4, 24775000), (5, 19820000), (8, 12387500), (10, 9910000), (16, 6193750), (20, 4955000), (25, 3964000), (32, 3096875), (40, 2477500), (50, 1982000), (80, 1238750), (100, 991000), (125, 792800), (160, 619375), (200, 495500), (250, 396400), (400, 247750), (500, 198200), (625, 158560), (800, 123875), (991, 100000), (1000, 99100), (1250, 79280), (1982, 50000), (2000, 49550), (2500, 39640), (3125, 31712), (3964, 25000), (4000, 24775), (4955, 20000), (5000, 19820), (6250, 15856), (7928, 12500), (9910, 10000)]