21176460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1657}}^1$

素因数の和:1743

約数の個数: 72

約数和(自身を含む): 65179296

約数和(自身を除く): 44002836

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1657, 2130, 2556, 3195, 3314, 4260, 4971, 6390, 6628, 8285, 9942, 12780, 14913, 16570, 19884, 24855, 29826, 33140, 49710, 59652, 74565, 99420, 117647, 149130, 235294, 298260, 352941, 470588, 588235, 705882, 1058823, 1176470, 1411764, 1764705, 2117646, 2352940, 3529410, 4235292, 5294115, 7058820, 10588230, 21176460]

約数ペア:

[(1, 21176460), (2, 10588230), (3, 7058820), (4, 5294115), (5, 4235292), (6, 3529410), (9, 2352940), (10, 2117646), (12, 1764705), (15, 1411764), (18, 1176470), (20, 1058823), (30, 705882), (36, 588235), (45, 470588), (60, 352941), (71, 298260), (90, 235294), (142, 149130), (180, 117647), (213, 99420), (284, 74565), (355, 59652), (426, 49710), (639, 33140), (710, 29826), (852, 24855), (1065, 19884), (1278, 16570), (1420, 14913), (1657, 12780), (2130, 9942), (2556, 8285), (3195, 6628), (3314, 6390), (4260, 4971)]