251720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 64

約数和(自身を含む): 691200

約数和(自身を除く): 439480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 31, 35, 40, 56, 58, 62, 70, 116, 124, 140, 145, 155, 203, 217, 232, 248, 280, 290, 310, 406, 434, 580, 620, 812, 868, 899, 1015, 1085, 1160, 1240, 1624, 1736, 1798, 2030, 2170, 3596, 4060, 4340, 4495, 6293, 7192, 8120, 8680, 8990, 12586, 17980, 25172, 31465, 35960, 50344, 62930, 125860, 251720]

約数ペア:

[(1, 251720), (2, 125860), (4, 62930), (5, 50344), (7, 35960), (8, 31465), (10, 25172), (14, 17980), (20, 12586), (28, 8990), (29, 8680), (31, 8120), (35, 7192), (40, 6293), (56, 4495), (58, 4340), (62, 4060), (70, 3596), (116, 2170), (124, 2030), (140, 1798), (145, 1736), (155, 1624), (203, 1240), (217, 1160), (232, 1085), (248, 1015), (280, 899), (290, 868), (310, 812), (406, 620), (434, 580)]