21580900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{853}}^1$

素因数の和:901

約数の個数: 72

約数和(自身を含む): 53371584

約数和(自身を除く): 31790684

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 25, 44, 46, 50, 55, 92, 100, 110, 115, 220, 230, 253, 275, 460, 506, 550, 575, 853, 1012, 1100, 1150, 1265, 1706, 2300, 2530, 3412, 4265, 5060, 6325, 8530, 9383, 12650, 17060, 18766, 19619, 21325, 25300, 37532, 39238, 42650, 46915, 78476, 85300, 93830, 98095, 187660, 196190, 215809, 234575, 392380, 431618, 469150, 490475, 863236, 938300, 980950, 1079045, 1961900, 2158090, 4316180, 5395225, 10790450, 21580900]

約数ペア:

[(1, 21580900), (2, 10790450), (4, 5395225), (5, 4316180), (10, 2158090), (11, 1961900), (20, 1079045), (22, 980950), (23, 938300), (25, 863236), (44, 490475), (46, 469150), (50, 431618), (55, 392380), (92, 234575), (100, 215809), (110, 196190), (115, 187660), (220, 98095), (230, 93830), (253, 85300), (275, 78476), (460, 46915), (506, 42650), (550, 39238), (575, 37532), (853, 25300), (1012, 21325), (1100, 19619), (1150, 18766), (1265, 17060), (1706, 12650), (2300, 9383), (2530, 8530), (3412, 6325), (4265, 5060)]