21185580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:355

約数の個数: 96

約数和(自身を含む): 64661184

約数和(自身を除く): 43475604

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 157, 173, 195, 260, 314, 346, 390, 471, 519, 628, 692, 780, 785, 865, 942, 1038, 1570, 1730, 1884, 2041, 2076, 2249, 2355, 2595, 3140, 3460, 4082, 4498, 4710, 5190, 6123, 6747, 8164, 8996, 9420, 10205, 10380, 11245, 12246, 13494, 20410, 22490, 24492, 26988, 27161, 30615, 33735, 40820, 44980, 54322, 61230, 67470, 81483, 108644, 122460, 134940, 135805, 162966, 271610, 325932, 353093, 407415, 543220, 706186, 814830, 1059279, 1412372, 1629660, 1765465, 2118558, 3530930, 4237116, 5296395, 7061860, 10592790, 21185580]

約数ペア:

[(1, 21185580), (2, 10592790), (3, 7061860), (4, 5296395), (5, 4237116), (6, 3530930), (10, 2118558), (12, 1765465), (13, 1629660), (15, 1412372), (20, 1059279), (26, 814830), (30, 706186), (39, 543220), (52, 407415), (60, 353093), (65, 325932), (78, 271610), (130, 162966), (156, 135805), (157, 134940), (173, 122460), (195, 108644), (260, 81483), (314, 67470), (346, 61230), (390, 54322), (471, 44980), (519, 40820), (628, 33735), (692, 30615), (780, 27161), (785, 26988), (865, 24492), (942, 22490), (1038, 20410), (1570, 13494), (1730, 12246), (1884, 11245), (2041, 10380), (2076, 10205), (2249, 9420), (2355, 8996), (2595, 8164), (3140, 6747), (3460, 6123), (4082, 5190), (4498, 4710)]