396026240

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{19961}}^1$

素因数の和:20011

約数の個数: 64

約数和(自身を含む): 977339520

約数和(自身を除く): 581313280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 19840, 19961, 39922, 79844, 99805, 159688, 199610, 319376, 399220, 618791, 638752, 798440, 1237582, 1277504, 1596880, 2475164, 2555008, 3093955, 3193760, 4950328, 6187910, 6387520, 9900656, 12375820, 12775040, 19801312, 24751640, 39602624, 49503280, 79205248, 99006560, 198013120, 396026240]

約数ペア:

[(1, 396026240), (2, 198013120), (4, 99006560), (5, 79205248), (8, 49503280), (10, 39602624), (16, 24751640), (20, 19801312), (31, 12775040), (32, 12375820), (40, 9900656), (62, 6387520), (64, 6187910), (80, 4950328), (124, 3193760), (128, 3093955), (155, 2555008), (160, 2475164), (248, 1596880), (310, 1277504), (320, 1237582), (496, 798440), (620, 638752), (640, 618791), (992, 399220), (1240, 319376), (1984, 199610), (2480, 159688), (3968, 99805), (4960, 79844), (9920, 39922), (19840, 19961)]