256977500

素因数分解:

$2^2\times 5^4\times {\mathrm{13}}^1\times {\mathrm{7907}}^1$

素因数の和:7944

約数の個数: 60

約数和(自身を含む): 605262504

約数和(自身を除く): 348285004

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 625, 650, 1250, 1300, 1625, 2500, 3250, 6500, 7907, 8125, 15814, 16250, 31628, 32500, 39535, 79070, 102791, 158140, 197675, 205582, 395350, 411164, 513955, 790700, 988375, 1027910, 1976750, 2055820, 2569775, 3953500, 4941875, 5139550, 9883750, 10279100, 12848875, 19767500, 25697750, 51395500, 64244375, 128488750, 256977500]

約数ペア:

[(1, 256977500), (2, 128488750), (4, 64244375), (5, 51395500), (10, 25697750), (13, 19767500), (20, 12848875), (25, 10279100), (26, 9883750), (50, 5139550), (52, 4941875), (65, 3953500), (100, 2569775), (125, 2055820), (130, 1976750), (250, 1027910), (260, 988375), (325, 790700), (500, 513955), (625, 411164), (650, 395350), (1250, 205582), (1300, 197675), (1625, 158140), (2500, 102791), (3250, 79070), (6500, 39535), (7907, 32500), (8125, 31628), (15814, 16250)]