21121616

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:172

約数の個数: 80

約数和(自身を含む): 47050560

約数和(自身を除く): 25928944

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 61, 67, 68, 76, 122, 134, 136, 152, 244, 268, 272, 304, 323, 488, 536, 646, 976, 1037, 1072, 1139, 1159, 1273, 1292, 2074, 2278, 2318, 2546, 2584, 4087, 4148, 4556, 4636, 5092, 5168, 8174, 8296, 9112, 9272, 10184, 16348, 16592, 18224, 18544, 19703, 20368, 21641, 32696, 39406, 43282, 65392, 69479, 77653, 78812, 86564, 138958, 155306, 157624, 173128, 277916, 310612, 315248, 346256, 555832, 621224, 1111664, 1242448, 1320101, 2640202, 5280404, 10560808, 21121616]

約数ペア:

[(1, 21121616), (2, 10560808), (4, 5280404), (8, 2640202), (16, 1320101), (17, 1242448), (19, 1111664), (34, 621224), (38, 555832), (61, 346256), (67, 315248), (68, 310612), (76, 277916), (122, 173128), (134, 157624), (136, 155306), (152, 138958), (244, 86564), (268, 78812), (272, 77653), (304, 69479), (323, 65392), (488, 43282), (536, 39406), (646, 32696), (976, 21641), (1037, 20368), (1072, 19703), (1139, 18544), (1159, 18224), (1273, 16592), (1292, 16348), (2074, 10184), (2278, 9272), (2318, 9112), (2546, 8296), (2584, 8174), (4087, 5168), (4148, 5092), (4556, 4636)]