20416340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{251}}^1$

素因数の和:357

約数の個数: 72

約数和(自身を含む): 50676192

約数和(自身を除く): 30259852

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 83, 98, 140, 166, 196, 245, 251, 332, 415, 490, 502, 581, 830, 980, 1004, 1162, 1255, 1660, 1757, 2324, 2510, 2905, 3514, 4067, 5020, 5810, 7028, 8134, 8785, 11620, 12299, 16268, 17570, 20335, 20833, 24598, 35140, 40670, 41666, 49196, 61495, 81340, 83332, 104165, 122990, 145831, 208330, 245980, 291662, 416660, 583324, 729155, 1020817, 1458310, 2041634, 2916620, 4083268, 5104085, 10208170, 20416340]

約数ペア:

[(1, 20416340), (2, 10208170), (4, 5104085), (5, 4083268), (7, 2916620), (10, 2041634), (14, 1458310), (20, 1020817), (28, 729155), (35, 583324), (49, 416660), (70, 291662), (83, 245980), (98, 208330), (140, 145831), (166, 122990), (196, 104165), (245, 83332), (251, 81340), (332, 61495), (415, 49196), (490, 41666), (502, 40670), (581, 35140), (830, 24598), (980, 20833), (1004, 20335), (1162, 17570), (1255, 16268), (1660, 12299), (1757, 11620), (2324, 8785), (2510, 8134), (2905, 7028), (3514, 5810), (4067, 5020)]