19943820

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{947}}^1$

素因数の和:981

約数の個数: 120

約数和(自身を含む): 67448304

約数和(自身を除く): 47504484

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 78, 81, 90, 108, 117, 130, 135, 156, 162, 180, 195, 234, 260, 270, 324, 351, 390, 405, 468, 540, 585, 702, 780, 810, 947, 1053, 1170, 1404, 1620, 1755, 1894, 2106, 2340, 2841, 3510, 3788, 4212, 4735, 5265, 5682, 7020, 8523, 9470, 10530, 11364, 12311, 14205, 17046, 18940, 21060, 24622, 25569, 28410, 34092, 36933, 42615, 49244, 51138, 56820, 61555, 73866, 76707, 85230, 102276, 110799, 123110, 127845, 147732, 153414, 170460, 184665, 221598, 246220, 255690, 306828, 332397, 369330, 383535, 443196, 511380, 553995, 664794, 738660, 767070, 997191, 1107990, 1329588, 1534140, 1661985, 1994382, 2215980, 3323970, 3988764, 4985955, 6647940, 9971910, 19943820]

約数ペア:

[(1, 19943820), (2, 9971910), (3, 6647940), (4, 4985955), (5, 3988764), (6, 3323970), (9, 2215980), (10, 1994382), (12, 1661985), (13, 1534140), (15, 1329588), (18, 1107990), (20, 997191), (26, 767070), (27, 738660), (30, 664794), (36, 553995), (39, 511380), (45, 443196), (52, 383535), (54, 369330), (60, 332397), (65, 306828), (78, 255690), (81, 246220), (90, 221598), (108, 184665), (117, 170460), (130, 153414), (135, 147732), (156, 127845), (162, 123110), (180, 110799), (195, 102276), (234, 85230), (260, 76707), (270, 73866), (324, 61555), (351, 56820), (390, 51138), (405, 49244), (468, 42615), (540, 36933), (585, 34092), (702, 28410), (780, 25569), (810, 24622), (947, 21060), (1053, 18940), (1170, 17046), (1404, 14205), (1620, 12311), (1755, 11364), (1894, 10530), (2106, 9470), (2340, 8523), (2841, 7020), (3510, 5682), (3788, 5265), (4212, 4735)]