28130000

素因数分解:

$2^4\times 5^4\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:154

約数の個数: 100

約数和(自身を含む): 71180340

約数和(自身を除く): 43050340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 29, 40, 50, 58, 80, 97, 100, 116, 125, 145, 194, 200, 232, 250, 290, 388, 400, 464, 485, 500, 580, 625, 725, 776, 970, 1000, 1160, 1250, 1450, 1552, 1940, 2000, 2320, 2425, 2500, 2813, 2900, 3625, 3880, 4850, 5000, 5626, 5800, 7250, 7760, 9700, 10000, 11252, 11600, 12125, 14065, 14500, 18125, 19400, 22504, 24250, 28130, 29000, 36250, 38800, 45008, 48500, 56260, 58000, 60625, 70325, 72500, 97000, 112520, 121250, 140650, 145000, 194000, 225040, 242500, 281300, 290000, 351625, 485000, 562600, 703250, 970000, 1125200, 1406500, 1758125, 2813000, 3516250, 5626000, 7032500, 14065000, 28130000]

約数ペア:

[(1, 28130000), (2, 14065000), (4, 7032500), (5, 5626000), (8, 3516250), (10, 2813000), (16, 1758125), (20, 1406500), (25, 1125200), (29, 970000), (40, 703250), (50, 562600), (58, 485000), (80, 351625), (97, 290000), (100, 281300), (116, 242500), (125, 225040), (145, 194000), (194, 145000), (200, 140650), (232, 121250), (250, 112520), (290, 97000), (388, 72500), (400, 70325), (464, 60625), (485, 58000), (500, 56260), (580, 48500), (625, 45008), (725, 38800), (776, 36250), (970, 29000), (1000, 28130), (1160, 24250), (1250, 22504), (1450, 19400), (1552, 18125), (1940, 14500), (2000, 14065), (2320, 12125), (2425, 11600), (2500, 11252), (2813, 10000), (2900, 9700), (3625, 7760), (3880, 7250), (4850, 5800), (5000, 5626)]