21818820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21391}}^1$

素因数の和:21420

約数の個数: 48

約数和(自身を含む): 64689408

約数和(自身を除く): 42870588

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 21391, 42782, 64173, 85564, 106955, 128346, 213910, 256692, 320865, 363647, 427820, 641730, 727294, 1090941, 1283460, 1454588, 1818235, 2181882, 3636470, 4363764, 5454705, 7272940, 10909410, 21818820]

約数ペア:

[(1, 21818820), (2, 10909410), (3, 7272940), (4, 5454705), (5, 4363764), (6, 3636470), (10, 2181882), (12, 1818235), (15, 1454588), (17, 1283460), (20, 1090941), (30, 727294), (34, 641730), (51, 427820), (60, 363647), (68, 320865), (85, 256692), (102, 213910), (170, 128346), (204, 106955), (255, 85564), (340, 64173), (510, 42782), (1020, 21391)]