64210000

素因数分解:

$2^4\times 5^4\times {\mathrm{6421}}^1$

素因数の和:6449

約数の個数: 50

約数和(自身を含む): 155483042

約数和(自身を除く): 91273042

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 6421, 10000, 12842, 25684, 32105, 51368, 64210, 102736, 128420, 160525, 256840, 321050, 513680, 642100, 802625, 1284200, 1605250, 2568400, 3210500, 4013125, 6421000, 8026250, 12842000, 16052500, 32105000, 64210000]

約数ペア:

[(1, 64210000), (2, 32105000), (4, 16052500), (5, 12842000), (8, 8026250), (10, 6421000), (16, 4013125), (20, 3210500), (25, 2568400), (40, 1605250), (50, 1284200), (80, 802625), (100, 642100), (125, 513680), (200, 321050), (250, 256840), (400, 160525), (500, 128420), (625, 102736), (1000, 64210), (1250, 51368), (2000, 32105), (2500, 25684), (5000, 12842), (6421, 10000)]