656820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 2063880

約数和(自身を除く): 1407060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 41, 45, 60, 82, 89, 90, 123, 164, 178, 180, 205, 246, 267, 356, 369, 410, 445, 492, 534, 615, 738, 801, 820, 890, 1068, 1230, 1335, 1476, 1602, 1780, 1845, 2460, 2670, 3204, 3649, 3690, 4005, 5340, 7298, 7380, 8010, 10947, 14596, 16020, 18245, 21894, 32841, 36490, 43788, 54735, 65682, 72980, 109470, 131364, 164205, 218940, 328410, 656820]

約数ペア:

[(1, 656820), (2, 328410), (3, 218940), (4, 164205), (5, 131364), (6, 109470), (9, 72980), (10, 65682), (12, 54735), (15, 43788), (18, 36490), (20, 32841), (30, 21894), (36, 18245), (41, 16020), (45, 14596), (60, 10947), (82, 8010), (89, 7380), (90, 7298), (123, 5340), (164, 4005), (178, 3690), (180, 3649), (205, 3204), (246, 2670), (267, 2460), (356, 1845), (369, 1780), (410, 1602), (445, 1476), (492, 1335), (534, 1230), (615, 1068), (738, 890), (801, 820)]