21619376

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1303}}^1$

素因数の和:1389

約数の個数: 40

約数和(自身を含む): 45113184

約数和(自身を除く): 23493808

約数列:

[1, 2, 4, 8, 16, 17, 34, 61, 68, 122, 136, 244, 272, 488, 976, 1037, 1303, 2074, 2606, 4148, 5212, 8296, 10424, 16592, 20848, 22151, 44302, 79483, 88604, 158966, 177208, 317932, 354416, 635864, 1271728, 1351211, 2702422, 5404844, 10809688, 21619376]

約数ペア:

[(1, 21619376), (2, 10809688), (4, 5404844), (8, 2702422), (16, 1351211), (17, 1271728), (34, 635864), (61, 354416), (68, 317932), (122, 177208), (136, 158966), (244, 88604), (272, 79483), (488, 44302), (976, 22151), (1037, 20848), (1303, 16592), (2074, 10424), (2606, 8296), (4148, 5212)]