21284760

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25339}}^1$

素因数の和:25360

約数の個数: 64

約数和(自身を含む): 72979200

約数和(自身を除く): 51694440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25339, 50678, 76017, 101356, 126695, 152034, 177373, 202712, 253390, 304068, 354746, 380085, 506780, 532119, 608136, 709492, 760170, 886865, 1013560, 1064238, 1418984, 1520340, 1773730, 2128476, 2660595, 3040680, 3547460, 4256952, 5321190, 7094920, 10642380, 21284760]

約数ペア:

[(1, 21284760), (2, 10642380), (3, 7094920), (4, 5321190), (5, 4256952), (6, 3547460), (7, 3040680), (8, 2660595), (10, 2128476), (12, 1773730), (14, 1520340), (15, 1418984), (20, 1064238), (21, 1013560), (24, 886865), (28, 760170), (30, 709492), (35, 608136), (40, 532119), (42, 506780), (56, 380085), (60, 354746), (70, 304068), (84, 253390), (105, 202712), (120, 177373), (140, 152034), (168, 126695), (210, 101356), (280, 76017), (420, 50678), (840, 25339)]