20352040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:530

約数の個数: 64

約数和(自身を含む): 49104000

約数和(自身を除く): 28751960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 61, 76, 95, 122, 152, 190, 244, 305, 380, 439, 488, 610, 760, 878, 1159, 1220, 1756, 2195, 2318, 2440, 3512, 4390, 4636, 5795, 8341, 8780, 9272, 11590, 16682, 17560, 23180, 26779, 33364, 41705, 46360, 53558, 66728, 83410, 107116, 133895, 166820, 214232, 267790, 333640, 508801, 535580, 1017602, 1071160, 2035204, 2544005, 4070408, 5088010, 10176020, 20352040]

約数ペア:

[(1, 20352040), (2, 10176020), (4, 5088010), (5, 4070408), (8, 2544005), (10, 2035204), (19, 1071160), (20, 1017602), (38, 535580), (40, 508801), (61, 333640), (76, 267790), (95, 214232), (122, 166820), (152, 133895), (190, 107116), (244, 83410), (305, 66728), (380, 53558), (439, 46360), (488, 41705), (610, 33364), (760, 26779), (878, 23180), (1159, 17560), (1220, 16682), (1756, 11590), (2195, 9272), (2318, 8780), (2440, 8341), (3512, 5795), (4390, 4636)]