15820020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{491}}^1$

素因数の和:685

約数の個数: 72

約数和(自身を含む): 48353760

約数和(自身を除く): 32533740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 179, 180, 358, 491, 537, 716, 895, 982, 1074, 1473, 1611, 1790, 1964, 2148, 2455, 2685, 2946, 3222, 3580, 4419, 4910, 5370, 5892, 6444, 7365, 8055, 8838, 9820, 10740, 14730, 16110, 17676, 22095, 29460, 32220, 44190, 87889, 88380, 175778, 263667, 351556, 439445, 527334, 791001, 878890, 1054668, 1318335, 1582002, 1757780, 2636670, 3164004, 3955005, 5273340, 7910010, 15820020]

約数ペア:

[(1, 15820020), (2, 7910010), (3, 5273340), (4, 3955005), (5, 3164004), (6, 2636670), (9, 1757780), (10, 1582002), (12, 1318335), (15, 1054668), (18, 878890), (20, 791001), (30, 527334), (36, 439445), (45, 351556), (60, 263667), (90, 175778), (179, 88380), (180, 87889), (358, 44190), (491, 32220), (537, 29460), (716, 22095), (895, 17676), (982, 16110), (1074, 14730), (1473, 10740), (1611, 9820), (1790, 8838), (1964, 8055), (2148, 7365), (2455, 6444), (2685, 5892), (2946, 5370), (3222, 4910), (3580, 4419)]