78989840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{331}}^1$

素因数の和:520

約数の個数: 80

約数和(自身を含む): 195136320

約数和(自身を除く): 116146480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 157, 190, 304, 314, 331, 380, 628, 662, 760, 785, 1256, 1324, 1520, 1570, 1655, 2512, 2648, 2983, 3140, 3310, 5296, 5966, 6280, 6289, 6620, 11932, 12560, 12578, 13240, 14915, 23864, 25156, 26480, 29830, 31445, 47728, 50312, 51967, 59660, 62890, 100624, 103934, 119320, 125780, 207868, 238640, 251560, 259835, 415736, 503120, 519670, 831472, 987373, 1039340, 1974746, 2078680, 3949492, 4157360, 4936865, 7898984, 9873730, 15797968, 19747460, 39494920, 78989840]

約数ペア:

[(1, 78989840), (2, 39494920), (4, 19747460), (5, 15797968), (8, 9873730), (10, 7898984), (16, 4936865), (19, 4157360), (20, 3949492), (38, 2078680), (40, 1974746), (76, 1039340), (80, 987373), (95, 831472), (152, 519670), (157, 503120), (190, 415736), (304, 259835), (314, 251560), (331, 238640), (380, 207868), (628, 125780), (662, 119320), (760, 103934), (785, 100624), (1256, 62890), (1324, 59660), (1520, 51967), (1570, 50312), (1655, 47728), (2512, 31445), (2648, 29830), (2983, 26480), (3140, 25156), (3310, 23864), (5296, 14915), (5966, 13240), (6280, 12578), (6289, 12560), (6620, 11932)]