21238880

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10211}}^1$

素因数の和:10239

約数の個数: 48

約数和(自身を含む): 54041904

約数和(自身を除く): 32803024

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10211, 20422, 40844, 51055, 81688, 102110, 132743, 163376, 204220, 265486, 326752, 408440, 530972, 663715, 816880, 1061944, 1327430, 1633760, 2123888, 2654860, 4247776, 5309720, 10619440, 21238880]

約数ペア:

[(1, 21238880), (2, 10619440), (4, 5309720), (5, 4247776), (8, 2654860), (10, 2123888), (13, 1633760), (16, 1327430), (20, 1061944), (26, 816880), (32, 663715), (40, 530972), (52, 408440), (65, 326752), (80, 265486), (104, 204220), (130, 163376), (160, 132743), (208, 102110), (260, 81688), (416, 51055), (520, 40844), (1040, 20422), (2080, 10211)]