2178920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:138

約数の個数: 64

約数和(自身を含む): 5356800

約数和(自身を除く): 3177880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 47, 61, 76, 94, 95, 122, 152, 188, 190, 235, 244, 305, 376, 380, 470, 488, 610, 760, 893, 940, 1159, 1220, 1786, 1880, 2318, 2440, 2867, 3572, 4465, 4636, 5734, 5795, 7144, 8930, 9272, 11468, 11590, 14335, 17860, 22936, 23180, 28670, 35720, 46360, 54473, 57340, 108946, 114680, 217892, 272365, 435784, 544730, 1089460, 2178920]

約数ペア:

[(1, 2178920), (2, 1089460), (4, 544730), (5, 435784), (8, 272365), (10, 217892), (19, 114680), (20, 108946), (38, 57340), (40, 54473), (47, 46360), (61, 35720), (76, 28670), (94, 23180), (95, 22936), (122, 17860), (152, 14335), (188, 11590), (190, 11468), (235, 9272), (244, 8930), (305, 7144), (376, 5795), (380, 5734), (470, 4636), (488, 4465), (610, 3572), (760, 2867), (893, 2440), (940, 2318), (1159, 1880), (1220, 1786)]