21959920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{241}}^1$

素因数の和:338

約数の個数: 80

約数和(自身を含む): 55094688

約数和(自身を除く): 33134768

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 67, 68, 80, 85, 134, 136, 170, 241, 268, 272, 335, 340, 482, 536, 670, 680, 964, 1072, 1139, 1205, 1340, 1360, 1928, 2278, 2410, 2680, 3856, 4097, 4556, 4820, 5360, 5695, 8194, 9112, 9640, 11390, 16147, 16388, 18224, 19280, 20485, 22780, 32294, 32776, 40970, 45560, 64588, 65552, 80735, 81940, 91120, 129176, 161470, 163880, 258352, 274499, 322940, 327760, 548998, 645880, 1097996, 1291760, 1372495, 2195992, 2744990, 4391984, 5489980, 10979960, 21959920]

約数ペア:

[(1, 21959920), (2, 10979960), (4, 5489980), (5, 4391984), (8, 2744990), (10, 2195992), (16, 1372495), (17, 1291760), (20, 1097996), (34, 645880), (40, 548998), (67, 327760), (68, 322940), (80, 274499), (85, 258352), (134, 163880), (136, 161470), (170, 129176), (241, 91120), (268, 81940), (272, 80735), (335, 65552), (340, 64588), (482, 45560), (536, 40970), (670, 32776), (680, 32294), (964, 22780), (1072, 20485), (1139, 19280), (1205, 18224), (1340, 16388), (1360, 16147), (1928, 11390), (2278, 9640), (2410, 9112), (2680, 8194), (3856, 5695), (4097, 5360), (4556, 4820)]