21827720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{607}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 52531200

約数和(自身を除く): 30703480

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 31, 40, 58, 62, 116, 124, 145, 155, 232, 248, 290, 310, 580, 607, 620, 899, 1160, 1214, 1240, 1798, 2428, 3035, 3596, 4495, 4856, 6070, 7192, 8990, 12140, 17603, 17980, 18817, 24280, 35206, 35960, 37634, 70412, 75268, 88015, 94085, 140824, 150536, 176030, 188170, 352060, 376340, 545693, 704120, 752680, 1091386, 2182772, 2728465, 4365544, 5456930, 10913860, 21827720]

約数ペア:

[(1, 21827720), (2, 10913860), (4, 5456930), (5, 4365544), (8, 2728465), (10, 2182772), (20, 1091386), (29, 752680), (31, 704120), (40, 545693), (58, 376340), (62, 352060), (116, 188170), (124, 176030), (145, 150536), (155, 140824), (232, 94085), (248, 88015), (290, 75268), (310, 70412), (580, 37634), (607, 35960), (620, 35206), (899, 24280), (1160, 18817), (1214, 17980), (1240, 17603), (1798, 12140), (2428, 8990), (3035, 7192), (3596, 6070), (4495, 4856)]