21783320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:444

約数の個数: 64

約数和(自身を含む): 53313120

約数和(自身を除く): 31529800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 163, 257, 260, 326, 514, 520, 652, 815, 1028, 1285, 1304, 1630, 2056, 2119, 2570, 3260, 3341, 4238, 5140, 6520, 6682, 8476, 10280, 10595, 13364, 16705, 16952, 21190, 26728, 33410, 41891, 42380, 66820, 83782, 84760, 133640, 167564, 209455, 335128, 418910, 544583, 837820, 1089166, 1675640, 2178332, 2722915, 4356664, 5445830, 10891660, 21783320]

約数ペア:

[(1, 21783320), (2, 10891660), (4, 5445830), (5, 4356664), (8, 2722915), (10, 2178332), (13, 1675640), (20, 1089166), (26, 837820), (40, 544583), (52, 418910), (65, 335128), (104, 209455), (130, 167564), (163, 133640), (257, 84760), (260, 83782), (326, 66820), (514, 42380), (520, 41891), (652, 33410), (815, 26728), (1028, 21190), (1285, 16952), (1304, 16705), (1630, 13364), (2056, 10595), (2119, 10280), (2570, 8476), (3260, 6682), (3341, 6520), (4238, 5140)]