28813840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:400

約数の個数: 80

約数和(自身を含む): 73923840

約数和(自身を除く): 45110000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 137, 176, 220, 239, 274, 440, 478, 548, 685, 880, 956, 1096, 1195, 1370, 1507, 1912, 2192, 2390, 2629, 2740, 3014, 3824, 4780, 5258, 5480, 6028, 7535, 9560, 10516, 10960, 12056, 13145, 15070, 19120, 21032, 24112, 26290, 30140, 32743, 42064, 52580, 60280, 65486, 105160, 120560, 130972, 163715, 210320, 261944, 327430, 360173, 523888, 654860, 720346, 1309720, 1440692, 1800865, 2619440, 2881384, 3601730, 5762768, 7203460, 14406920, 28813840]

約数ペア:

[(1, 28813840), (2, 14406920), (4, 7203460), (5, 5762768), (8, 3601730), (10, 2881384), (11, 2619440), (16, 1800865), (20, 1440692), (22, 1309720), (40, 720346), (44, 654860), (55, 523888), (80, 360173), (88, 327430), (110, 261944), (137, 210320), (176, 163715), (220, 130972), (239, 120560), (274, 105160), (440, 65486), (478, 60280), (548, 52580), (685, 42064), (880, 32743), (956, 30140), (1096, 26290), (1195, 24112), (1370, 21032), (1507, 19120), (1912, 15070), (2192, 13145), (2390, 12056), (2629, 10960), (2740, 10516), (3014, 9560), (3824, 7535), (4780, 6028), (5258, 5480)]