31380720

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{18679}}^1$

素因数の和:18702

約数の個数: 80

約数和(自身を含む): 111183360

約数和(自身を除く): 79802640

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, 18679, 37358, 56037, 74716, 93395, 112074, 130753, 149432, 186790, 224148, 261506, 280185, 298864, 373580, 392259, 448296, 523012, 560370, 653765, 747160, 784518, 896592, 1046024, 1120740, 1307530, 1494320, 1569036, 1961295, 2092048, 2241480, 2615060, 3138072, 3922590, 4482960, 5230120, 6276144, 7845180, 10460240, 15690360, 31380720]

約数ペア:

[(1, 31380720), (2, 15690360), (3, 10460240), (4, 7845180), (5, 6276144), (6, 5230120), (7, 4482960), (8, 3922590), (10, 3138072), (12, 2615060), (14, 2241480), (15, 2092048), (16, 1961295), (20, 1569036), (21, 1494320), (24, 1307530), (28, 1120740), (30, 1046024), (35, 896592), (40, 784518), (42, 747160), (48, 653765), (56, 560370), (60, 523012), (70, 448296), (80, 392259), (84, 373580), (105, 298864), (112, 280185), (120, 261506), (140, 224148), (168, 186790), (210, 149432), (240, 130753), (280, 112074), (336, 93395), (420, 74716), (560, 56037), (840, 37358), (1680, 18679)]