21238875

素因数分解:

$3^3\times 5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:91

約数の個数: 128

約数和(自身を含む): 47923200

約数和(自身を除く): 26684325

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 29, 31, 35, 45, 63, 75, 87, 93, 105, 125, 135, 145, 155, 175, 189, 203, 217, 225, 261, 279, 315, 375, 435, 465, 525, 609, 651, 675, 725, 775, 783, 837, 875, 899, 945, 1015, 1085, 1125, 1305, 1395, 1575, 1827, 1953, 2175, 2325, 2625, 2697, 3045, 3255, 3375, 3625, 3875, 3915, 4185, 4495, 4725, 5075, 5425, 5481, 5859, 6293, 6525, 6975, 7875, 8091, 9135, 9765, 10875, 11625, 13485, 15225, 16275, 18879, 19575, 20925, 22475, 23625, 24273, 25375, 27125, 27405, 29295, 31465, 32625, 34875, 40455, 45675, 48825, 56637, 67425, 76125, 81375, 94395, 97875, 104625, 112375, 121365, 137025, 146475, 157325, 169911, 202275, 228375, 244125, 283185, 337125, 471975, 606825, 685125, 732375, 786625, 849555, 1011375, 1415925, 2359875, 3034125, 4247775, 7079625, 21238875]

約数ペア:

[(1, 21238875), (3, 7079625), (5, 4247775), (7, 3034125), (9, 2359875), (15, 1415925), (21, 1011375), (25, 849555), (27, 786625), (29, 732375), (31, 685125), (35, 606825), (45, 471975), (63, 337125), (75, 283185), (87, 244125), (93, 228375), (105, 202275), (125, 169911), (135, 157325), (145, 146475), (155, 137025), (175, 121365), (189, 112375), (203, 104625), (217, 97875), (225, 94395), (261, 81375), (279, 76125), (315, 67425), (375, 56637), (435, 48825), (465, 45675), (525, 40455), (609, 34875), (651, 32625), (675, 31465), (725, 29295), (775, 27405), (783, 27125), (837, 25375), (875, 24273), (899, 23625), (945, 22475), (1015, 20925), (1085, 19575), (1125, 18879), (1305, 16275), (1395, 15225), (1575, 13485), (1827, 11625), (1953, 10875), (2175, 9765), (2325, 9135), (2625, 8091), (2697, 7875), (3045, 6975), (3255, 6525), (3375, 6293), (3625, 5859), (3875, 5481), (3915, 5425), (4185, 5075), (4495, 4725)]