28678780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1511}}^1$

素因数の和:1606

約数の個数: 48

約数和(自身を含む): 65790144

約数和(自身を除く): 37111364

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1460, 1511, 1898, 3022, 3796, 4745, 6044, 7555, 9490, 15110, 18980, 19643, 30220, 39286, 78572, 98215, 110303, 196430, 220606, 392860, 441212, 551515, 1103030, 1433939, 2206060, 2867878, 5735756, 7169695, 14339390, 28678780]

約数ペア:

[(1, 28678780), (2, 14339390), (4, 7169695), (5, 5735756), (10, 2867878), (13, 2206060), (20, 1433939), (26, 1103030), (52, 551515), (65, 441212), (73, 392860), (130, 220606), (146, 196430), (260, 110303), (292, 98215), (365, 78572), (730, 39286), (949, 30220), (1460, 19643), (1511, 18980), (1898, 15110), (3022, 9490), (3796, 7555), (4745, 6044)]