78812500

素因数分解:

$2^2\times 5^6\times {\mathrm{13}}^1\times {\mathrm{97}}^1$

素因数の和:144

約数の個数: 84

約数和(自身を含む): 187575724

約数和(自身を除く): 108763224

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 97, 100, 125, 130, 194, 250, 260, 325, 388, 485, 500, 625, 650, 970, 1250, 1261, 1300, 1625, 1940, 2425, 2500, 2522, 3125, 3250, 4850, 5044, 6250, 6305, 6500, 8125, 9700, 12125, 12500, 12610, 15625, 16250, 24250, 25220, 31250, 31525, 32500, 40625, 48500, 60625, 62500, 63050, 81250, 121250, 126100, 157625, 162500, 203125, 242500, 303125, 315250, 406250, 606250, 630500, 788125, 812500, 1212500, 1515625, 1576250, 3031250, 3152500, 3940625, 6062500, 7881250, 15762500, 19703125, 39406250, 78812500]

約数ペア:

[(1, 78812500), (2, 39406250), (4, 19703125), (5, 15762500), (10, 7881250), (13, 6062500), (20, 3940625), (25, 3152500), (26, 3031250), (50, 1576250), (52, 1515625), (65, 1212500), (97, 812500), (100, 788125), (125, 630500), (130, 606250), (194, 406250), (250, 315250), (260, 303125), (325, 242500), (388, 203125), (485, 162500), (500, 157625), (625, 126100), (650, 121250), (970, 81250), (1250, 63050), (1261, 62500), (1300, 60625), (1625, 48500), (1940, 40625), (2425, 32500), (2500, 31525), (2522, 31250), (3125, 25220), (3250, 24250), (4850, 16250), (5044, 15625), (6250, 12610), (6305, 12500), (6500, 12125), (8125, 9700)]