2478140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{571}}^1$

素因数の和:618

約数の個数: 48

約数和(自身を含む): 6150144

約数和(自身を除く): 3672004

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 571, 620, 868, 1085, 1142, 2170, 2284, 2855, 3997, 4340, 5710, 7994, 11420, 15988, 17701, 19985, 35402, 39970, 70804, 79940, 88505, 123907, 177010, 247814, 354020, 495628, 619535, 1239070, 2478140]

約数ペア:

[(1, 2478140), (2, 1239070), (4, 619535), (5, 495628), (7, 354020), (10, 247814), (14, 177010), (20, 123907), (28, 88505), (31, 79940), (35, 70804), (62, 39970), (70, 35402), (124, 19985), (140, 17701), (155, 15988), (217, 11420), (310, 7994), (434, 5710), (571, 4340), (620, 3997), (868, 2855), (1085, 2284), (1142, 2170)]