21505428

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1399}}^1$

素因数の和:1477

約数の個数: 72

約数和(自身を含む): 63190400

約数和(自身を除く): 41684972

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 61, 63, 84, 122, 126, 183, 244, 252, 366, 427, 549, 732, 854, 1098, 1281, 1399, 1708, 2196, 2562, 2798, 3843, 4197, 5124, 5596, 7686, 8394, 9793, 12591, 15372, 16788, 19586, 25182, 29379, 39172, 50364, 58758, 85339, 88137, 117516, 170678, 176274, 256017, 341356, 352548, 512034, 597373, 768051, 1024068, 1194746, 1536102, 1792119, 2389492, 3072204, 3584238, 5376357, 7168476, 10752714, 21505428]

約数ペア:

[(1, 21505428), (2, 10752714), (3, 7168476), (4, 5376357), (6, 3584238), (7, 3072204), (9, 2389492), (12, 1792119), (14, 1536102), (18, 1194746), (21, 1024068), (28, 768051), (36, 597373), (42, 512034), (61, 352548), (63, 341356), (84, 256017), (122, 176274), (126, 170678), (183, 117516), (244, 88137), (252, 85339), (366, 58758), (427, 50364), (549, 39172), (732, 29379), (854, 25182), (1098, 19586), (1281, 16788), (1399, 15372), (1708, 12591), (2196, 9793), (2562, 8394), (2798, 7686), (3843, 5596), (4197, 5124)]