21031860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{971}}^1$

素因数の和:1021

約数の個数: 72

約数和(自身を含む): 62215776

約数和(自身を除く): 41183916

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 190, 228, 285, 361, 380, 570, 722, 971, 1083, 1140, 1444, 1805, 1942, 2166, 2913, 3610, 3884, 4332, 4855, 5415, 5826, 7220, 9710, 10830, 11652, 14565, 18449, 19420, 21660, 29130, 36898, 55347, 58260, 73796, 92245, 110694, 184490, 221388, 276735, 350531, 368980, 553470, 701062, 1051593, 1106940, 1402124, 1752655, 2103186, 3505310, 4206372, 5257965, 7010620, 10515930, 21031860]

約数ペア:

[(1, 21031860), (2, 10515930), (3, 7010620), (4, 5257965), (5, 4206372), (6, 3505310), (10, 2103186), (12, 1752655), (15, 1402124), (19, 1106940), (20, 1051593), (30, 701062), (38, 553470), (57, 368980), (60, 350531), (76, 276735), (95, 221388), (114, 184490), (190, 110694), (228, 92245), (285, 73796), (361, 58260), (380, 55347), (570, 36898), (722, 29130), (971, 21660), (1083, 19420), (1140, 18449), (1444, 14565), (1805, 11652), (1942, 10830), (2166, 9710), (2913, 7220), (3610, 5826), (3884, 5415), (4332, 4855)]