28084940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{991}}^1$

素因数の和:1122

約数の個数: 48

約数和(自身を含む): 64162560

約数和(自身を除く): 36077620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 436, 545, 991, 1090, 1417, 1982, 2180, 2834, 3964, 4955, 5668, 7085, 9910, 12883, 14170, 19820, 25766, 28340, 51532, 64415, 108019, 128830, 216038, 257660, 432076, 540095, 1080190, 1404247, 2160380, 2808494, 5616988, 7021235, 14042470, 28084940]

約数ペア:

[(1, 28084940), (2, 14042470), (4, 7021235), (5, 5616988), (10, 2808494), (13, 2160380), (20, 1404247), (26, 1080190), (52, 540095), (65, 432076), (109, 257660), (130, 216038), (218, 128830), (260, 108019), (436, 64415), (545, 51532), (991, 28340), (1090, 25766), (1417, 19820), (1982, 14170), (2180, 12883), (2834, 9910), (3964, 7085), (4955, 5668)]