20856800

素因数分解:

$2^5\times 5^2\times {\mathrm{29}}^2\times {\mathrm{31}}^1$

素因数の和:109

約数の個数: 108

約数和(自身を含む): 54434016

約数和(自身を除く): 33577216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 29, 31, 32, 40, 50, 58, 62, 80, 100, 116, 124, 145, 155, 160, 200, 232, 248, 290, 310, 400, 464, 496, 580, 620, 725, 775, 800, 841, 899, 928, 992, 1160, 1240, 1450, 1550, 1682, 1798, 2320, 2480, 2900, 3100, 3364, 3596, 4205, 4495, 4640, 4960, 5800, 6200, 6728, 7192, 8410, 8990, 11600, 12400, 13456, 14384, 16820, 17980, 21025, 22475, 23200, 24800, 26071, 26912, 28768, 33640, 35960, 42050, 44950, 52142, 67280, 71920, 84100, 89900, 104284, 130355, 134560, 143840, 168200, 179800, 208568, 260710, 336400, 359600, 417136, 521420, 651775, 672800, 719200, 834272, 1042840, 1303550, 2085680, 2607100, 4171360, 5214200, 10428400, 20856800]

約数ペア:

[(1, 20856800), (2, 10428400), (4, 5214200), (5, 4171360), (8, 2607100), (10, 2085680), (16, 1303550), (20, 1042840), (25, 834272), (29, 719200), (31, 672800), (32, 651775), (40, 521420), (50, 417136), (58, 359600), (62, 336400), (80, 260710), (100, 208568), (116, 179800), (124, 168200), (145, 143840), (155, 134560), (160, 130355), (200, 104284), (232, 89900), (248, 84100), (290, 71920), (310, 67280), (400, 52142), (464, 44950), (496, 42050), (580, 35960), (620, 33640), (725, 28768), (775, 26912), (800, 26071), (841, 24800), (899, 23200), (928, 22475), (992, 21025), (1160, 17980), (1240, 16820), (1450, 14384), (1550, 13456), (1682, 12400), (1798, 11600), (2320, 8990), (2480, 8410), (2900, 7192), (3100, 6728), (3364, 6200), (3596, 5800), (4205, 4960), (4495, 4640)]