28780700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^3\times {\mathrm{131}}^1$

素因数の和:184

約数の個数: 72

約数和(自身を含む): 68172720

約数和(自身を除く): 39392020

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 131, 169, 260, 262, 325, 338, 524, 650, 655, 676, 845, 1300, 1310, 1690, 1703, 2197, 2620, 3275, 3380, 3406, 4225, 4394, 6550, 6812, 8450, 8515, 8788, 10985, 13100, 16900, 17030, 21970, 22139, 34060, 42575, 43940, 44278, 54925, 85150, 88556, 109850, 110695, 170300, 219700, 221390, 287807, 442780, 553475, 575614, 1106950, 1151228, 1439035, 2213900, 2878070, 5756140, 7195175, 14390350, 28780700]

約数ペア:

[(1, 28780700), (2, 14390350), (4, 7195175), (5, 5756140), (10, 2878070), (13, 2213900), (20, 1439035), (25, 1151228), (26, 1106950), (50, 575614), (52, 553475), (65, 442780), (100, 287807), (130, 221390), (131, 219700), (169, 170300), (260, 110695), (262, 109850), (325, 88556), (338, 85150), (524, 54925), (650, 44278), (655, 43940), (676, 42575), (845, 34060), (1300, 22139), (1310, 21970), (1690, 17030), (1703, 16900), (2197, 13100), (2620, 10985), (3275, 8788), (3380, 8515), (3406, 8450), (4225, 6812), (4394, 6550)]