208488520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{397}}^1\times {\mathrm{691}}^1$

素因数の和:1118

約数の個数: 64

約数和(自身を含む): 495748800

約数和(自身を除く): 287260280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 397, 691, 760, 794, 1382, 1588, 1985, 2764, 3176, 3455, 3970, 5528, 6910, 7543, 7940, 13129, 13820, 15086, 15880, 26258, 27640, 30172, 37715, 52516, 60344, 65645, 75430, 105032, 131290, 150860, 262580, 274327, 301720, 525160, 548654, 1097308, 1371635, 2194616, 2743270, 5212213, 5486540, 10424426, 10973080, 20848852, 26061065, 41697704, 52122130, 104244260, 208488520]

約数ペア:

[(1, 208488520), (2, 104244260), (4, 52122130), (5, 41697704), (8, 26061065), (10, 20848852), (19, 10973080), (20, 10424426), (38, 5486540), (40, 5212213), (76, 2743270), (95, 2194616), (152, 1371635), (190, 1097308), (380, 548654), (397, 525160), (691, 301720), (760, 274327), (794, 262580), (1382, 150860), (1588, 131290), (1985, 105032), (2764, 75430), (3176, 65645), (3455, 60344), (3970, 52516), (5528, 37715), (6910, 30172), (7543, 27640), (7940, 26258), (13129, 15880), (13820, 15086)]