21699615

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 42624000

約数和(自身を除く): 20924385

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 73, 95, 105, 133, 149, 219, 285, 365, 399, 447, 511, 665, 745, 1043, 1095, 1387, 1533, 1995, 2235, 2555, 2831, 3129, 4161, 5215, 6935, 7665, 8493, 9709, 10877, 14155, 15645, 19817, 20805, 29127, 32631, 42465, 48545, 54385, 59451, 76139, 99085, 145635, 163155, 206663, 228417, 297255, 380695, 619989, 1033315, 1142085, 1446641, 3099945, 4339923, 7233205, 21699615]

約数ペア:

[(1, 21699615), (3, 7233205), (5, 4339923), (7, 3099945), (15, 1446641), (19, 1142085), (21, 1033315), (35, 619989), (57, 380695), (73, 297255), (95, 228417), (105, 206663), (133, 163155), (149, 145635), (219, 99085), (285, 76139), (365, 59451), (399, 54385), (447, 48545), (511, 42465), (665, 32631), (745, 29127), (1043, 20805), (1095, 19817), (1387, 15645), (1533, 14155), (1995, 10877), (2235, 9709), (2555, 8493), (2831, 7665), (3129, 6935), (4161, 5215)]