21486920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5903}}^1$

素因数の和:5934

約数の個数: 64

約数和(自身を含む): 59512320

約数和(自身を除く): 38025400

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5903, 11806, 23612, 29515, 41321, 47224, 59030, 76739, 82642, 118060, 153478, 165284, 206605, 236120, 306956, 330568, 383695, 413210, 537173, 613912, 767390, 826420, 1074346, 1534780, 1652840, 2148692, 2685865, 3069560, 4297384, 5371730, 10743460, 21486920]

約数ペア:

[(1, 21486920), (2, 10743460), (4, 5371730), (5, 4297384), (7, 3069560), (8, 2685865), (10, 2148692), (13, 1652840), (14, 1534780), (20, 1074346), (26, 826420), (28, 767390), (35, 613912), (40, 537173), (52, 413210), (56, 383695), (65, 330568), (70, 306956), (91, 236120), (104, 206605), (130, 165284), (140, 153478), (182, 118060), (260, 82642), (280, 76739), (364, 59030), (455, 47224), (520, 41321), (728, 29515), (910, 23612), (1820, 11806), (3640, 5903)]