28206920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{769}}^1$

素因数の和:918

約数の個数: 64

約数和(自身を含む): 73180800

約数和(自身を除く): 44973880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 131, 140, 262, 280, 524, 655, 769, 917, 1048, 1310, 1538, 1834, 2620, 3076, 3668, 3845, 4585, 5240, 5383, 6152, 7336, 7690, 9170, 10766, 15380, 18340, 21532, 26915, 30760, 36680, 43064, 53830, 100739, 107660, 201478, 215320, 402956, 503695, 705173, 805912, 1007390, 1410346, 2014780, 2820692, 3525865, 4029560, 5641384, 7051730, 14103460, 28206920]

約数ペア:

[(1, 28206920), (2, 14103460), (4, 7051730), (5, 5641384), (7, 4029560), (8, 3525865), (10, 2820692), (14, 2014780), (20, 1410346), (28, 1007390), (35, 805912), (40, 705173), (56, 503695), (70, 402956), (131, 215320), (140, 201478), (262, 107660), (280, 100739), (524, 53830), (655, 43064), (769, 36680), (917, 30760), (1048, 26915), (1310, 21532), (1538, 18340), (1834, 15380), (2620, 10766), (3076, 9170), (3668, 7690), (3845, 7336), (4585, 6152), (5240, 5383)]