20917680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12451}}^1$

素因数の和:12474

約数の個数: 80

約数和(自身を含む): 74114304

約数和(自身を除く): 53196624

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12451, 24902, 37353, 49804, 62255, 74706, 87157, 99608, 124510, 149412, 174314, 186765, 199216, 249020, 261471, 298824, 348628, 373530, 435785, 498040, 522942, 597648, 697256, 747060, 871570, 996080, 1045884, 1307355, 1394512, 1494120, 1743140, 2091768, 2614710, 2988240, 3486280, 4183536, 5229420, 6972560, 10458840, 20917680]

約数ペア:

[(1, 20917680), (2, 10458840), (3, 6972560), (4, 5229420), (5, 4183536), (6, 3486280), (7, 2988240), (8, 2614710), (10, 2091768), (12, 1743140), (14, 1494120), (15, 1394512), (16, 1307355), (20, 1045884), (21, 996080), (24, 871570), (28, 747060), (30, 697256), (35, 597648), (40, 522942), (42, 498040), (48, 435785), (56, 373530), (60, 348628), (70, 298824), (80, 261471), (84, 249020), (105, 199216), (112, 186765), (120, 174314), (140, 149412), (168, 124510), (210, 99608), (240, 87157), (280, 74706), (336, 62255), (420, 49804), (560, 37353), (840, 24902), (1680, 12451)]