21252980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 32937100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 59, 62, 70, 83, 118, 124, 140, 155, 166, 217, 236, 295, 310, 332, 413, 415, 434, 581, 590, 620, 826, 830, 868, 1085, 1162, 1180, 1652, 1660, 1829, 2065, 2170, 2324, 2573, 2905, 3658, 4130, 4340, 4897, 5146, 5810, 7316, 8260, 9145, 9794, 10292, 11620, 12803, 12865, 18011, 18290, 19588, 24485, 25606, 25730, 34279, 36022, 36580, 48970, 51212, 51460, 64015, 68558, 72044, 90055, 97940, 128030, 137116, 151807, 171395, 180110, 256060, 303614, 342790, 360220, 607228, 685580, 759035, 1062649, 1518070, 2125298, 3036140, 4250596, 5313245, 10626490, 21252980]

約数ペア:

[(1, 21252980), (2, 10626490), (4, 5313245), (5, 4250596), (7, 3036140), (10, 2125298), (14, 1518070), (20, 1062649), (28, 759035), (31, 685580), (35, 607228), (59, 360220), (62, 342790), (70, 303614), (83, 256060), (118, 180110), (124, 171395), (140, 151807), (155, 137116), (166, 128030), (217, 97940), (236, 90055), (295, 72044), (310, 68558), (332, 64015), (413, 51460), (415, 51212), (434, 48970), (581, 36580), (590, 36022), (620, 34279), (826, 25730), (830, 25606), (868, 24485), (1085, 19588), (1162, 18290), (1180, 18011), (1652, 12865), (1660, 12803), (1829, 11620), (2065, 10292), (2170, 9794), (2324, 9145), (2573, 8260), (2905, 7316), (3658, 5810), (4130, 5146), (4340, 4897)]