256098440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{15887}}^1$

素因数の和:15942

約数の個数: 64

約数和(自身を含む): 640604160

約数和(自身を除く): 384505720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 2015, 3224, 4030, 8060, 15887, 16120, 31774, 63548, 79435, 127096, 158870, 206531, 317740, 413062, 492497, 635480, 826124, 984994, 1032655, 1652248, 1969988, 2065310, 2462485, 3939976, 4130620, 4924970, 6402461, 8261240, 9849940, 12804922, 19699880, 25609844, 32012305, 51219688, 64024610, 128049220, 256098440]

約数ペア:

[(1, 256098440), (2, 128049220), (4, 64024610), (5, 51219688), (8, 32012305), (10, 25609844), (13, 19699880), (20, 12804922), (26, 9849940), (31, 8261240), (40, 6402461), (52, 4924970), (62, 4130620), (65, 3939976), (104, 2462485), (124, 2065310), (130, 1969988), (155, 1652248), (248, 1032655), (260, 984994), (310, 826124), (403, 635480), (520, 492497), (620, 413062), (806, 317740), (1240, 206531), (1612, 158870), (2015, 127096), (3224, 79435), (4030, 63548), (8060, 31774), (15887, 16120)]