78881972

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{181}}^1$

素因数の和:261

約数の個数: 72

約数和(自身を含む): 164269560

約数和(自身を除く): 85387588

約数列:

[1, 2, 4, 13, 17, 26, 29, 34, 52, 58, 68, 116, 181, 221, 289, 362, 377, 442, 493, 578, 724, 754, 884, 986, 1156, 1508, 1972, 2353, 3077, 3757, 4706, 5249, 6154, 6409, 7514, 8381, 9412, 10498, 12308, 12818, 15028, 16762, 20996, 25636, 33524, 40001, 52309, 68237, 80002, 89233, 104618, 108953, 136474, 160004, 178466, 209236, 217906, 272948, 356932, 435812, 680017, 1160029, 1360034, 1516961, 2320058, 2720068, 3033922, 4640116, 6067844, 19720493, 39440986, 78881972]

約数ペア:

[(1, 78881972), (2, 39440986), (4, 19720493), (13, 6067844), (17, 4640116), (26, 3033922), (29, 2720068), (34, 2320058), (52, 1516961), (58, 1360034), (68, 1160029), (116, 680017), (181, 435812), (221, 356932), (289, 272948), (362, 217906), (377, 209236), (442, 178466), (493, 160004), (578, 136474), (724, 108953), (754, 104618), (884, 89233), (986, 80002), (1156, 68237), (1508, 52309), (1972, 40001), (2353, 33524), (3077, 25636), (3757, 20996), (4706, 16762), (5249, 15028), (6154, 12818), (6409, 12308), (7514, 10498), (8381, 9412)]