18520820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:153

約数の個数: 96

約数和(自身を含む): 44997120

約数和(自身を除く): 26476300

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 47, 61, 68, 76, 85, 94, 95, 122, 170, 188, 190, 235, 244, 305, 323, 340, 380, 470, 610, 646, 799, 893, 940, 1037, 1159, 1220, 1292, 1598, 1615, 1786, 2074, 2318, 2867, 3196, 3230, 3572, 3995, 4148, 4465, 4636, 5185, 5734, 5795, 6460, 7990, 8930, 10370, 11468, 11590, 14335, 15181, 15980, 17860, 19703, 20740, 23180, 28670, 30362, 39406, 48739, 54473, 57340, 60724, 75905, 78812, 97478, 98515, 108946, 151810, 194956, 197030, 217892, 243695, 272365, 303620, 394060, 487390, 544730, 926041, 974780, 1089460, 1852082, 3704164, 4630205, 9260410, 18520820]

約数ペア:

[(1, 18520820), (2, 9260410), (4, 4630205), (5, 3704164), (10, 1852082), (17, 1089460), (19, 974780), (20, 926041), (34, 544730), (38, 487390), (47, 394060), (61, 303620), (68, 272365), (76, 243695), (85, 217892), (94, 197030), (95, 194956), (122, 151810), (170, 108946), (188, 98515), (190, 97478), (235, 78812), (244, 75905), (305, 60724), (323, 57340), (340, 54473), (380, 48739), (470, 39406), (610, 30362), (646, 28670), (799, 23180), (893, 20740), (940, 19703), (1037, 17860), (1159, 15980), (1220, 15181), (1292, 14335), (1598, 11590), (1615, 11468), (1786, 10370), (2074, 8930), (2318, 7990), (2867, 6460), (3196, 5795), (3230, 5734), (3572, 5185), (3995, 4636), (4148, 4465)]