21965720

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1601}}^1$

素因数の和:1633

約数の個数: 64

約数和(自身を含む): 57672000

約数和(自身を除く): 35706280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1601, 1715, 1960, 2744, 3202, 3430, 6404, 6860, 8005, 11207, 12808, 13720, 16010, 22414, 32020, 44828, 56035, 64040, 78449, 89656, 112070, 156898, 224140, 313796, 392245, 448280, 549143, 627592, 784490, 1098286, 1568980, 2196572, 2745715, 3137960, 4393144, 5491430, 10982860, 21965720]

約数ペア:

[(1, 21965720), (2, 10982860), (4, 5491430), (5, 4393144), (7, 3137960), (8, 2745715), (10, 2196572), (14, 1568980), (20, 1098286), (28, 784490), (35, 627592), (40, 549143), (49, 448280), (56, 392245), (70, 313796), (98, 224140), (140, 156898), (196, 112070), (245, 89656), (280, 78449), (343, 64040), (392, 56035), (490, 44828), (686, 32020), (980, 22414), (1372, 16010), (1601, 13720), (1715, 12808), (1960, 11207), (2744, 8005), (3202, 6860), (3430, 6404)]