21540880

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^2\times {\mathrm{509}}^1$

素因数の和:568

約数の個数: 60

約数和(自身を含む): 52457580

約数和(自身を除く): 30916700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 509, 529, 920, 1018, 1058, 1840, 2036, 2116, 2545, 2645, 4072, 4232, 5090, 5290, 8144, 8464, 10180, 10580, 11707, 20360, 21160, 23414, 40720, 42320, 46828, 58535, 93656, 117070, 187312, 234140, 269261, 468280, 538522, 936560, 1077044, 1346305, 2154088, 2692610, 4308176, 5385220, 10770440, 21540880]

約数ペア:

[(1, 21540880), (2, 10770440), (4, 5385220), (5, 4308176), (8, 2692610), (10, 2154088), (16, 1346305), (20, 1077044), (23, 936560), (40, 538522), (46, 468280), (80, 269261), (92, 234140), (115, 187312), (184, 117070), (230, 93656), (368, 58535), (460, 46828), (509, 42320), (529, 40720), (920, 23414), (1018, 21160), (1058, 20360), (1840, 11707), (2036, 10580), (2116, 10180), (2545, 8464), (2645, 8144), (4072, 5290), (4232, 5090)]