28281880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:257

約数の個数: 128

約数和(自身を含む): 77760000

約数和(自身を除く): 49478120

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 19, 20, 22, 34, 38, 40, 44, 55, 68, 76, 85, 88, 95, 110, 136, 152, 170, 187, 190, 199, 209, 220, 323, 340, 374, 380, 398, 418, 440, 646, 680, 748, 760, 796, 836, 935, 995, 1045, 1292, 1496, 1592, 1615, 1672, 1870, 1990, 2090, 2189, 2584, 3230, 3383, 3553, 3740, 3781, 3980, 4180, 4378, 6460, 6766, 7106, 7480, 7562, 7960, 8360, 8756, 10945, 12920, 13532, 14212, 15124, 16915, 17512, 17765, 18905, 21890, 27064, 28424, 30248, 33830, 35530, 37213, 37810, 41591, 43780, 64277, 67660, 71060, 74426, 75620, 83182, 87560, 128554, 135320, 142120, 148852, 151240, 166364, 186065, 207955, 257108, 297704, 321385, 332728, 372130, 415910, 514216, 642770, 707047, 744260, 831820, 1285540, 1414094, 1488520, 1663640, 2571080, 2828188, 3535235, 5656376, 7070470, 14140940, 28281880]

約数ペア:

[(1, 28281880), (2, 14140940), (4, 7070470), (5, 5656376), (8, 3535235), (10, 2828188), (11, 2571080), (17, 1663640), (19, 1488520), (20, 1414094), (22, 1285540), (34, 831820), (38, 744260), (40, 707047), (44, 642770), (55, 514216), (68, 415910), (76, 372130), (85, 332728), (88, 321385), (95, 297704), (110, 257108), (136, 207955), (152, 186065), (170, 166364), (187, 151240), (190, 148852), (199, 142120), (209, 135320), (220, 128554), (323, 87560), (340, 83182), (374, 75620), (380, 74426), (398, 71060), (418, 67660), (440, 64277), (646, 43780), (680, 41591), (748, 37810), (760, 37213), (796, 35530), (836, 33830), (935, 30248), (995, 28424), (1045, 27064), (1292, 21890), (1496, 18905), (1592, 17765), (1615, 17512), (1672, 16915), (1870, 15124), (1990, 14212), (2090, 13532), (2189, 12920), (2584, 10945), (3230, 8756), (3383, 8360), (3553, 7960), (3740, 7562), (3781, 7480), (3980, 7106), (4180, 6766), (4378, 6460)]