20818680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:453

約数の個数: 128

約数和(自身を含む): 68774400

約数和(自身を除く): 47955720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 23, 24, 30, 38, 40, 46, 57, 60, 69, 76, 92, 95, 114, 115, 120, 138, 152, 184, 190, 228, 230, 276, 285, 345, 380, 397, 437, 456, 460, 552, 570, 690, 760, 794, 874, 920, 1140, 1191, 1311, 1380, 1588, 1748, 1985, 2185, 2280, 2382, 2622, 2760, 3176, 3496, 3970, 4370, 4764, 5244, 5955, 6555, 7543, 7940, 8740, 9131, 9528, 10488, 11910, 13110, 15086, 15880, 17480, 18262, 22629, 23820, 26220, 27393, 30172, 36524, 37715, 45258, 45655, 47640, 52440, 54786, 60344, 73048, 75430, 90516, 91310, 109572, 113145, 136965, 150860, 173489, 181032, 182620, 219144, 226290, 273930, 301720, 346978, 365240, 452580, 520467, 547860, 693956, 867445, 905160, 1040934, 1095720, 1387912, 1734890, 2081868, 2602335, 3469780, 4163736, 5204670, 6939560, 10409340, 20818680]

約数ペア:

[(1, 20818680), (2, 10409340), (3, 6939560), (4, 5204670), (5, 4163736), (6, 3469780), (8, 2602335), (10, 2081868), (12, 1734890), (15, 1387912), (19, 1095720), (20, 1040934), (23, 905160), (24, 867445), (30, 693956), (38, 547860), (40, 520467), (46, 452580), (57, 365240), (60, 346978), (69, 301720), (76, 273930), (92, 226290), (95, 219144), (114, 182620), (115, 181032), (120, 173489), (138, 150860), (152, 136965), (184, 113145), (190, 109572), (228, 91310), (230, 90516), (276, 75430), (285, 73048), (345, 60344), (380, 54786), (397, 52440), (437, 47640), (456, 45655), (460, 45258), (552, 37715), (570, 36524), (690, 30172), (760, 27393), (794, 26220), (874, 23820), (920, 22629), (1140, 18262), (1191, 17480), (1311, 15880), (1380, 15086), (1588, 13110), (1748, 11910), (1985, 10488), (2185, 9528), (2280, 9131), (2382, 8740), (2622, 7940), (2760, 7543), (3176, 6555), (3496, 5955), (3970, 5244), (4370, 4764)]