2005403920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{4957}}^1$

素因数の和:5372

約数の個数: 80

約数和(自身を含む): 5035146480

約数和(自身を除く): 3029742560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 389, 520, 778, 1040, 1556, 1945, 3112, 3890, 4957, 5057, 6224, 7780, 9914, 10114, 15560, 19828, 20228, 24785, 25285, 31120, 39656, 40456, 49570, 50570, 64441, 79312, 80912, 99140, 101140, 128882, 198280, 202280, 257764, 322205, 396560, 404560, 515528, 644410, 1031056, 1288820, 1928273, 2577640, 3856546, 5155280, 7713092, 9641365, 15426184, 19282730, 25067549, 30852368, 38565460, 50135098, 77130920, 100270196, 125337745, 154261840, 200540392, 250675490, 401080784, 501350980, 1002701960, 2005403920]

約数ペア:

[(1, 2005403920), (2, 1002701960), (4, 501350980), (5, 401080784), (8, 250675490), (10, 200540392), (13, 154261840), (16, 125337745), (20, 100270196), (26, 77130920), (40, 50135098), (52, 38565460), (65, 30852368), (80, 25067549), (104, 19282730), (130, 15426184), (208, 9641365), (260, 7713092), (389, 5155280), (520, 3856546), (778, 2577640), (1040, 1928273), (1556, 1288820), (1945, 1031056), (3112, 644410), (3890, 515528), (4957, 404560), (5057, 396560), (6224, 322205), (7780, 257764), (9914, 202280), (10114, 198280), (15560, 128882), (19828, 101140), (20228, 99140), (24785, 80912), (25285, 79312), (31120, 64441), (39656, 50570), (40456, 49570)]