21357840

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12713}}^1$

素因数の和:12736

約数の個数: 80

約数和(自身を含む): 75673728

約数和(自身を除く): 54315888

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12713, 25426, 38139, 50852, 63565, 76278, 88991, 101704, 127130, 152556, 177982, 190695, 203408, 254260, 266973, 305112, 355964, 381390, 444955, 508520, 533946, 610224, 711928, 762780, 889910, 1017040, 1067892, 1334865, 1423856, 1525560, 1779820, 2135784, 2669730, 3051120, 3559640, 4271568, 5339460, 7119280, 10678920, 21357840]

約数ペア:

[(1, 21357840), (2, 10678920), (3, 7119280), (4, 5339460), (5, 4271568), (6, 3559640), (7, 3051120), (8, 2669730), (10, 2135784), (12, 1779820), (14, 1525560), (15, 1423856), (16, 1334865), (20, 1067892), (21, 1017040), (24, 889910), (28, 762780), (30, 711928), (35, 610224), (40, 533946), (42, 508520), (48, 444955), (56, 381390), (60, 355964), (70, 305112), (80, 266973), (84, 254260), (105, 203408), (112, 190695), (120, 177982), (140, 152556), (168, 127130), (210, 101704), (240, 88991), (280, 76278), (336, 63565), (420, 50852), (560, 38139), (840, 25426), (1680, 12713)]