28780380

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:480

約数の個数: 96

約数和(自身を含む): 90316800

約数和(自身を除く): 61536420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 223, 239, 270, 446, 478, 540, 669, 717, 892, 956, 1115, 1195, 1338, 1434, 2007, 2151, 2230, 2390, 2676, 2868, 3345, 3585, 4014, 4302, 4460, 4780, 6021, 6453, 6690, 7170, 8028, 8604, 10035, 10755, 12042, 12906, 13380, 14340, 20070, 21510, 24084, 25812, 30105, 32265, 40140, 43020, 53297, 60210, 64530, 106594, 120420, 129060, 159891, 213188, 266485, 319782, 479673, 532970, 639564, 799455, 959346, 1065940, 1439019, 1598910, 1918692, 2398365, 2878038, 3197820, 4796730, 5756076, 7195095, 9593460, 14390190, 28780380]

約数ペア:

[(1, 28780380), (2, 14390190), (3, 9593460), (4, 7195095), (5, 5756076), (6, 4796730), (9, 3197820), (10, 2878038), (12, 2398365), (15, 1918692), (18, 1598910), (20, 1439019), (27, 1065940), (30, 959346), (36, 799455), (45, 639564), (54, 532970), (60, 479673), (90, 319782), (108, 266485), (135, 213188), (180, 159891), (223, 129060), (239, 120420), (270, 106594), (446, 64530), (478, 60210), (540, 53297), (669, 43020), (717, 40140), (892, 32265), (956, 30105), (1115, 25812), (1195, 24084), (1338, 21510), (1434, 20070), (2007, 14340), (2151, 13380), (2230, 12906), (2390, 12042), (2676, 10755), (2868, 10035), (3345, 8604), (3585, 8028), (4014, 7170), (4302, 6690), (4460, 6453), (4780, 6021)]