21207960

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1$

素因数の和:362

約数の個数: 128

約数和(自身を含む): 71928000

約数和(自身を除く): 50720040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 73, 90, 108, 120, 135, 146, 180, 216, 219, 269, 270, 292, 360, 365, 438, 538, 540, 584, 657, 730, 807, 876, 1076, 1080, 1095, 1314, 1345, 1460, 1614, 1752, 1971, 2152, 2190, 2421, 2628, 2690, 2920, 3228, 3285, 3942, 4035, 4380, 4842, 5256, 5380, 6456, 6570, 7263, 7884, 8070, 8760, 9684, 9855, 10760, 12105, 13140, 14526, 15768, 16140, 19368, 19637, 19710, 24210, 26280, 29052, 32280, 36315, 39274, 39420, 48420, 58104, 58911, 72630, 78548, 78840, 96840, 98185, 117822, 145260, 157096, 176733, 196370, 235644, 290520, 294555, 353466, 392740, 471288, 530199, 589110, 706932, 785480, 883665, 1060398, 1178220, 1413864, 1767330, 2120796, 2356440, 2650995, 3534660, 4241592, 5301990, 7069320, 10603980, 21207960]

約数ペア:

[(1, 21207960), (2, 10603980), (3, 7069320), (4, 5301990), (5, 4241592), (6, 3534660), (8, 2650995), (9, 2356440), (10, 2120796), (12, 1767330), (15, 1413864), (18, 1178220), (20, 1060398), (24, 883665), (27, 785480), (30, 706932), (36, 589110), (40, 530199), (45, 471288), (54, 392740), (60, 353466), (72, 294555), (73, 290520), (90, 235644), (108, 196370), (120, 176733), (135, 157096), (146, 145260), (180, 117822), (216, 98185), (219, 96840), (269, 78840), (270, 78548), (292, 72630), (360, 58911), (365, 58104), (438, 48420), (538, 39420), (540, 39274), (584, 36315), (657, 32280), (730, 29052), (807, 26280), (876, 24210), (1076, 19710), (1080, 19637), (1095, 19368), (1314, 16140), (1345, 15768), (1460, 14526), (1614, 13140), (1752, 12105), (1971, 10760), (2152, 9855), (2190, 9684), (2421, 8760), (2628, 8070), (2690, 7884), (2920, 7263), (3228, 6570), (3285, 6456), (3942, 5380), (4035, 5256), (4380, 4842)]